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

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    <issuer>
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        <issuerName>TAYLOR DEVICES INC</issuerName>
        <issuerTradingSymbol>TAYD</issuerTradingSymbol>
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            <rptOwnerName>NEWMAN REGINALD B II</rptOwnerName>
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            <rptOwnerStreet2>50 NORTH AIRPORT DRIVE</rptOwnerStreet2>
            <rptOwnerCity>BUFFALO</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>14225</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
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        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
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                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>5.885</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2013-07-08</value>
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            <transactionTimeliness>
                <value></value>
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            <transactionAmounts>
                <transactionShares>
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                </transactionShares>
                <transactionPricePerShare>
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                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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            <exerciseDate>
                <value>2006-04-18</value>
            </exerciseDate>
            <expirationDate>
                <value>2016-04-18</value>
            </expirationDate>
            <underlyingSecurity>
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                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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                </underlyingSecurityShares>
            </underlyingSecurity>
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                </sharesOwnedFollowingTransaction>
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            <securityTitle>
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            <transactionTimeliness>
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                <transactionPricePerShare>
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    </derivativeTable>

    <ownerSignature>
        <signatureName>/s/Reginald B. Newman II</signatureName>
        <signatureDate>2013-07-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
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X0306
4
2013-07-08
0
0000096536
TAYLOR DEVICES INC
TAYD
0001034049
NEWMAN REGINALD B II
PRIOR AVIATION SERVICE INC.
50 NORTH AIRPORT DRIVE
BUFFALO
NY
14225
1
0
0
0
Common Stock
2013-07-08
4
M
0
5000
5.885
A
15000
D
Common Stock
2013-07-08
4
M
0
5000
5.575
A
20000
D
Common Stock
2013-07-08
4
M
0
5000
5.205
A
25000
D
Common Stock
2013-07-08
4
M
0
5000
2.83
A
30000
D
Common Stock
2013-07-08
4
M
0
5000
6.35
A
35000
D
Common Stock
2013-07-08
4
M
0
5000
5.685
A
40000
D
Stock Option (Right to Buy)
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2013-07-08
4
M
0
5000
0
D
2006-04-18
2016-04-18
Common Stock
5000
0
D
Stock Option (Right to Buy)
5.575
2013-07-08
4
M
0
5000
0
D
2007-04-18
2017-04-18
Common Stock
5000
0
D
Stock Option (Right to Buy)
5.205
2013-07-08
4
M
0
5000
0
D
2008-04-18
2018-04-18
Common Stock
5000
0
D
Stock Option (Right to Buy)
2.83
2013-07-08
4
M
0
5000
0
D
2009-04-18
2019-04-18
Common Stock
5000
0
D
Stock Option (Right to Buy)
6.35
2013-07-08
4
M
0
5000
0
D
2010-04-18
2020-04-18
Common Stock
5000
0
D
Stock Option (Right to Buy)
5.685
2013-07-08
4
M
0
5000
0
D
2011-04-18
2021-04-18
Common Stock
5000
0
D
/s/Reginald B. Newman II
2013-07-09