<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-08-03</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000105668</issuerCik>
        <issuerName>WENDYS INTERNATIONAL INC</issuerName>
        <issuerTradingSymbol>WEN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001227530</rptOwnerCik>
            <rptOwnerName>HOUSE PAUL D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>WENDY'S INTERNATIONAL, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>P. O. BOX 256</rptOwnerStreet2>
            <rptOwnerCity>DUBLIN</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>43017-0256</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

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            <expirationDate>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
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                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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            <ownershipNature>
                <directOrIndirectOwnership>
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        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>OPTION (RIGHT  TO PURCHASE)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>27.125</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-08-03</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            <exerciseDate>
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            <expirationDate>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>7666</value>
                </underlyingSecurityShares>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>OPTION (RIGHT  TO PURCHASE)</value>
            </securityTitle>
            <conversionOrExercisePrice>
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            <transactionDate>
                <value>2005-08-03</value>
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            <transactionCoding>
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            <transactionAmounts>
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            <exerciseDate>
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            <expirationDate>
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            <underlyingSecurity>
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                <underlyingSecurityShares>
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            <transactionDate>
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            <transactionCoding>
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            <transactionAmounts>
                <transactionShares>
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                </transactionShares>
                <transactionPricePerShare>
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            <exerciseDate>
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            <expirationDate>
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            <underlyingSecurity>
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                <underlyingSecurityShares>
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            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
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        <derivativeTransaction>
            <securityTitle>
                <value>OPTION (RIGHT  TO PURCHASE)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>27.125</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-08-03</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>7667</value>
                </transactionShares>
                <transactionPricePerShare>
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                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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            </transactionAmounts>
            <exerciseDate>
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            <expirationDate>
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            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
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                <underlyingSecurityShares>
                    <value>7667</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>OPTION (RIGHT  TO PURCHASE)</value>
            </securityTitle>
            <conversionOrExercisePrice>
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            </conversionOrExercisePrice>
            <transactionDate>
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            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            </transactionAmounts>
            <exerciseDate>
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            </exerciseDate>
            <expirationDate>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
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                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>9874</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
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            <conversionOrExercisePrice>
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            <transactionDate>
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            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            <exerciseDate>
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            <expirationDate>
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            <underlyingSecurity>
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                <underlyingSecurityShares>
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            </underlyingSecurity>
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            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        <derivativeTransaction>
            <securityTitle>
                <value>OPTION (RIGHT  TO PURCHASE)</value>
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            <conversionOrExercisePrice>
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            <transactionDate>
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            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
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                <transactionPricePerShare>
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            <exerciseDate>
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            <expirationDate>
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            <underlyingSecurity>
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                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
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            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>OPTION (RIGHT  TO PURCHASE)</value>
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            <conversionOrExercisePrice>
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            <transactionDate>
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            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
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                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
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                </transactionShares>
                <transactionPricePerShare>
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                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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            <exerciseDate>
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            <expirationDate>
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            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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            </underlyingSecurity>
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            <ownershipNature>
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            </ownershipNature>
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    </derivativeTable>

    <footnotes>
        <footnote id="F1">SHARES SHOWN ON TABLE 1 INCLUDE SHARES ACQUIRED PURSUANT TO THE DIVIDEND EQUIVALENT RIGHT PROVISIONS OF A RESTRICTED STOCK UNIT AWARD MADE UNDER THE ISSUER'S 2003 STOCK INCENTIVE PLAN.</footnote>
        <footnote id="F2">SALE IN CONNECTION WITH EXERCISE OF EMPLOYEE STOCK OPTIONS.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>PAUL D HOUSE</signatureName>
        <signatureDate>2005-08-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
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X0202
4
2005-08-03
0
0000105668
WENDYS INTERNATIONAL INC
WEN
0001227530
HOUSE PAUL D
WENDY'S INTERNATIONAL, INC.
P. O. BOX 256
DUBLIN
OH
43017-0256
1
0
0
0
Common Stock
2005-08-03
4
M
0
7666
27.125
A
36753
D
Common Stock
2005-08-03
4
M
0
7666
27.125
A
44419
D
Common Stock
2005-08-03
4
M
0
7666
27.125
A
52085
D
Common Stock
2005-08-03
4
M
0
7667
27.125
A
59752
D
Common Stock
2005-08-03
4
M
0
7964
22.3438
A
67716
D
Common Stock
2005-08-03
4
M
0
7965
22.3438
A
75681
D
Common Stock
2005-08-03
4
M
0
7964
22.3438
A
83645
D
Common Stock
2005-08-03
4
M
0
7965
22.3438
A
91610
D
Common Stock
2005-08-03
4
M
0
9874
30.8438
A
101484
D
Common Stock
2005-08-03
4
M
0
9875
30.8438
A
111359
D
Common Stock
2005-08-03
4
M
0
9875
30.8438
A
121234
D
Common Stock
2005-08-03
4
M
0
9875
30.8438
A
131109
D
Common Stock
2005-08-03
4
M
0
2070
17.875
A
133179
D
Common Stock
2005-08-03
4
S
0
104092
51.5275
D
29087
D
OPTION (RIGHT  TO PURCHASE)
17.875
2005-08-03
4
M
0
2070
0
D
2002-08-01
2010-07-31
Common Stock
2070
44809
D
OPTION (RIGHT  TO PURCHASE)
22.3438
2005-08-03
4
M
0
7964
0
D
1999-07-30
2008-07-29
Common Stock
7964
23894
D
OPTION (RIGHT  TO PURCHASE)
22.3438
2005-08-03
4
M
0
7965
0
D
2000-07-30
2008-07-29
Common Stock
7965
15929
D
OPTION (RIGHT  TO PURCHASE)
22.3438
2005-08-03
4
M
0
7964
0
D
2001-07-30
2008-07-29
Common Stock
7964
7965
D
OPTION (RIGHT  TO PURCHASE)
22.3438
2005-08-03
4
M
0
7965
0
D
2002-07-30
2008-07-29
Common Stock
7965
0
D
OPTION (RIGHT  TO PURCHASE)
27.125
2005-08-03
4
M
0
7666
0
D
1998-07-30
2007-07-29
Common Stock
7666
22999
D
OPTION (RIGHT  TO PURCHASE)
27.125
2005-08-03
4
M
0
7666
0
D
1999-07-30
2007-07-29
Common Stock
7666
15333
D
OPTION (RIGHT  TO PURCHASE)
27.125
2005-08-03
4
M
0
7666
0
D
2001-07-30
2007-07-29
Common Stock
7666
7667
D
OPTION (RIGHT  TO PURCHASE)
27.125
2005-08-03
4
M
0
7667
0
D
1998-07-30
2007-07-29
Common Stock
7667
0
D
OPTION (RIGHT  TO PURCHASE)
30.8438
2005-08-03
4
M
0
9874
0
D
2000-07-28
2009-07-27
Common Stock
9874
29625
D
OPTION (RIGHT  TO PURCHASE)
30.8438
2005-08-03
4
M
0
9875
0
D
2001-07-28
2009-07-27
Common Stock
9875
19750
D
OPTION (RIGHT  TO PURCHASE)
30.8438
2005-08-03
4
M
0
9875
0
D
2002-07-28
2009-07-27
Common Stock
9875
9875
D
OPTION (RIGHT  TO PURCHASE)
30.8438
2005-08-03
4
M
0
9875
0
D
2003-07-28
2009-07-27
Common Stock
9875
0
D
SHARES SHOWN ON TABLE 1 INCLUDE SHARES ACQUIRED PURSUANT TO THE DIVIDEND EQUIVALENT RIGHT PROVISIONS OF A RESTRICTED STOCK UNIT AWARD MADE UNDER THE ISSUER'S 2003 STOCK INCENTIVE PLAN.
SALE IN CONNECTION WITH EXERCISE OF EMPLOYEE STOCK OPTIONS.
PAUL D HOUSE
2005-08-05