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

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-08-10</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001015715</issuerCik>
        <issuerName>BRAINTECH INC</issuerName>
        <issuerTradingSymbol>BRHI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001318065</rptOwnerCik>
            <rptOwnerName>WEIDINGER FREDERICK W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O BRAINTECH, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>1750 TYSONS BOULEVARD, SUITE 350</rptOwnerStreet2>
            <rptOwnerCity>MCLEAN</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>22102</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CHIEF EXECUTIVE OFFICER</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

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                <value>COMMON STOCK</value>
                <footnoteId id="F1"/>
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            <transactionDate>
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            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
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                </transactionShares>
                <transactionPricePerShare>
                    <value>.01</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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        <nonDerivativeTransaction>
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                <value></value>
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            <transactionAmounts>
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                <transactionPricePerShare>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>22246425</value>
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        <nonDerivativeTransaction>
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                <value>COMMON STOCK</value>
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                <transactionPricePerShare>
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                </transactionPricePerShare>
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                <sharesOwnedFollowingTransaction>
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            <transactionTimeliness>
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                <sharesOwnedFollowingTransaction>
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                </transactionShares>
                <transactionPricePerShare>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
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            <transactionTimeliness>
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            <transactionAmounts>
                <transactionShares>
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                </transactionShares>
                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
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            <securityTitle>
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            <transactionTimeliness>
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            <transactionAmounts>
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                <transactionPricePerShare>
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            <postTransactionAmounts>
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            </exerciseDate>
            <expirationDate>
                <value>2010-01-11</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>COMMON</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>62500</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>WARRANTS</value>
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            <conversionOrExercisePrice>
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            <exerciseDate>
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            </exerciseDate>
            <expirationDate>
                <value>2010-03-03</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>COMMON</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>48750</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>111250</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>WARRANTS</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>.30</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2005-05-03</value>
            </exerciseDate>
            <expirationDate>
                <value>2010-05-02</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>COMMON</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>125000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>236250</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>WARRANTS</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>.30</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2006-10-23</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-10-23</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>COMMON</value>
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                <underlyingSecurityShares>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
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            <exerciseDate>
                <value>2006-10-23</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-10-23</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>COMMON</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1125000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3611250</value>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>WARRANTS</value>
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            <conversionOrExercisePrice>
                <value>.30</value>
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            <exerciseDate>
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            <expirationDate>
                <value>2013-09-26</value>
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                <directOrIndirectOwnership>
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        <derivativeHolding>
            <securityTitle>
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            <expirationDate>
                <value>2013-09-26</value>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>COMMON</value>
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                    <value>D</value>
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        <derivativeHolding>
            <securityTitle>
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            <exerciseDate>
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            <expirationDate>
                <value>2012-10-22</value>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>OPTIONS</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>.42</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2008-12-17</value>
            </exerciseDate>
            <expirationDate>
                <value>2012-10-22</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>COMMON</value>
                </underlyingSecurityTitle>
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                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>1000000</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The Reporting Person had purchased these shares for an aggregate price of $30,000 ($.01 per share) under his previous Employment Agreement dated as of October 22, 2007 (?2007 Agreement?).  The shares had been held in escrow pending the achievement of certain defined milestones under the 2007 Agreement.  The milestones were not achieved during the term of the 2007 Agreement.  Accordingly, on August 10, 2009, under the terms of the 2007 Agreement, the shares were forfeited by the Reporting Person and the Company repurchased the shares for the original aggregate purchase price of $30,000 ($.01 per share).  At the Company?s request due to its cash situation, the Reporting Person voluntarily deferred this amount pursuant to a promissory note.</footnote>
        <footnote id="F2">These shares were issued pursuant to the Reporting Person?s new Employment and Retention Agreement dated as of January 1, 2009 (?2009 Agreement?).  The shares were acquired for $.01 per share and are held in escrow pending the achievement of certain defined milestones. If the milestones are not achieved during the term of the 2009 Agreement, the Company will repurchase the shares from the Reporting Person at a price of $.01 per share.</footnote>
        <footnote id="F3">These shares were issued in lieu of a salary increase pursuant to the 2009 Agreement.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ FREDERICK W. WEIDINGER</signatureName>
        <signatureDate>2009-10-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
