<SUBMISSION>
<ACCESSION-NUMBER>0001140361-09-026373
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20091115
<FILING-DATE>20091116
<DATE-OF-FILING-DATE-CHANGE>20091116
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Gremley Robert C
<CIK>0001458678
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>000-18059
<FILM-NUMBER>091188001
</FILING-VALUES>
<MAIL-ADDRESS>
<STREET1>140 KENDRICK STREET
<CITY>NEEDHAM
<STATE>MA
<ZIP>02494
</MAIL-ADDRESS>
</REPORTING-OWNER>
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>PARAMETRIC TECHNOLOGY CORP
<CIK>0000857005
<ASSIGNED-SIC>7372
<IRS-NUMBER>042866152
<STATE-OF-INCORPORATION>MA
<FISCAL-YEAR-END>0930
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>140 KENDRICK STREET
<CITY>NEEDHAM
<STATE>MA
<ZIP>02494
<PHONE>7813705000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>140 KENDRICK STREET
<CITY>NEEDHAM
<STATE>MA
<ZIP>02494
</MAIL-ADDRESS>
</ISSUER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
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            <rptOwnerZipCode>02494</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP, Chief Marketing Officer</officerTitle>
            <otherText></otherText>
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                    <value>D</value>
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                <footnoteId id="F6"/>
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    <footnotes>
        <footnote id="F1">Each restricted stock unit represents a contingent right to receive one share of Parametric Technology Corporation common stock.</footnote>
        <footnote id="F2">Tendered to Issuer to satisfy tax withholding obligations of Reporting Person incurred in connection with the vesting of 31,926 shares of the Reporting Person's restricted stock unit awards.</footnote>
        <footnote id="F3">Performance-based restricted stock units that vested on November 15, 2009 upon achievement of the performance criteria.</footnote>
        <footnote id="F4">Time-based restricted stock units that vested as to 4,486 RSUs on November 15, 2008, 4,485 RSUs on November 15, 2009 and vest as to 4,485 RSUs on November 15, 2010.</footnote>
        <footnote id="F5">Time-based restricted stock units that vested as to 12,210 RSUs on November 15, 2009 and vest as to 12,210 RSUs on November 15, 2010 and 12,210 RSUs on November 15, 2011.</footnote>
        <footnote id="F6">Time-based restricted stock units that vested as to 8,972 RSUs on November 15, 2009 and vest as to 4,484 RSUs on November 15, 2010.</footnote>
        <footnote id="F7">This amount represents the total number of derivative securities beneficially owned of the class shown.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Catherine Gorecki by power of attorney filed 3/13/2009</signatureName>
        <signatureDate>2009-11-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
