<SUBMISSION>
<ACCESSION-NUMBER>0000857005-06-000011
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20060301
<FILING-DATE>20060302
<DATE-OF-FILING-DATE-CHANGE>20060302
<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>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>PORTER MICHAEL E
<CIK>0001108494
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>000-18059
<FILM-NUMBER>06659487
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>HARVARD BUSINESS SCHOOL
<STREET2>SOLDIERS FIELD ROAD
<CITY>BOSTON
<STATE>MA
<ZIP>02163
</BUSINESS-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
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            <conversionOrExercisePrice>
                <value>5.25</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2006-03-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>0</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2002-09-19</value>
                <footnoteId id="F17"/>
            </exerciseDate>
            <expirationDate>
                <value>2007-09-19</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>12000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12000</value>
                    <footnoteId id="F5"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>4.975</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2006-03-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>0</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2004-02-13</value>
                <footnoteId id="F18"/>
            </exerciseDate>
            <expirationDate>
                <value>2013-02-13</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>10000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10000</value>
                    <footnoteId id="F5"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>11.475</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2006-03-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>0</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2005-03-03</value>
                <footnoteId id="F19"/>
            </exerciseDate>
            <expirationDate>
                <value>2014-03-03</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>10000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10000</value>
                    <footnoteId id="F5"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Restricted stock award to Reporting Person with restrictions on the shares lapsing as to one-third of such shares on each of February 15, 2007, February 15, 2008 and February 15, 2009.</footnote>
        <footnote id="F2">Adjusted to reflect the 2 for 5 reverse stock split effective February 28, 2006.</footnote>
        <footnote id="F3">This option was previously reported and is now being reported to reflect the 2 for 5 reverse stock split effective February 28, 2006.</footnote>
        <footnote id="F4">Option to buy 4,000 shares of common stock, exercisable in four annual increments of 1,000 each beginning on 2/13/1998, the first anniversary of the date of grant.</footnote>
        <footnote id="F5">This amount represents the total number of Derivative Securities Beneficially Owned of the class shown (i.e. the same exercise price and expiration date). The Reporting Person owns a total of 221,200 Options to Purchase Common Stock of varying classes (i.e. varying exercise prices and expiration dates).</footnote>
        <footnote id="F6">Option to buy 20,000 shares of common stock, exercisable as to 4,000 on 6/5/1997, 4,000 on 6/6/1997, 4,000 on 9/5/1997, 4,000 on 12/5/1997 and 4,000 on 3/5/1998.</footnote>
        <footnote id="F7">Option to buy 19,200 shares of common stock, exercisable as to 4,800 on 4/6/1998, 4,800 on 7/6/1998, 4,800 on 10/6/1998 and 4,800 on 1/6/1999.</footnote>
        <footnote id="F8">Option to buy 4,000 shares of common stock, exercisable in four annual increments of 1,000 each beginning on 2/12/1999, the first anniversary of the date of grant.</footnote>
        <footnote id="F9">Option to buy 12,000 shares exercisable as to 2,400 on 10/20/1998, 2,400 on 1/20/1999, 2,400 on 4/20/1999, 2,400 on 7/20/1999 and 2,400 on 10/20/1999.</footnote>
        <footnote id="F10">Option to buy 6,000 shares of common stock, exercisable in four annual increments of 1,500 each beginning on 2/11/2000, the first anniversary of the date of grant.</footnote>
        <footnote id="F11">Option to buy 6,000 shares of common stock, exercisable in four annual increments of 1,500 each beginning on 2/10/2001, the first anniversary of the date of grant.</footnote>
        <footnote id="F12">Option to buy 24,000 shares of common stock, exercisable in four annual increments of 6,000 each beginning on 6/20/2001, the first anniversary of the date of grant.</footnote>
        <footnote id="F13">Option to buy 6,000 shares of common stock, exercisable in four annual increments of 1,500 each beginning on 2/15/2002, the first anniversary of the date of grant.</footnote>
        <footnote id="F14">Option to buy 8,000 shares of common stock exercisable as to 4,000 shares on 6/16/2001 and 4,000 shares on 7/16/2001.</footnote>
        <footnote id="F15">Option to buy 60,000 shares of common stock, exercisable in four annual increments of 15,000 each beginning on 9/20/2002, the first anniversary of the date of grant.</footnote>
        <footnote id="F16">Option to buy 20,000 shares of common stock, exercisable in four annual increments of 5,000 each beginning on 5/30/2003, the first anniversary of the date of grant.</footnote>
        <footnote id="F17">Option to buy 12,000 shares of common stock exercisable as to 6,000 shares on 9/19/2002 and 6,000 shares on 3/19/2003.</footnote>
        <footnote id="F18">Option to buy 10,000 shares of common stock, exercisable in four annual increments of 2,500 each beginning on 2/13/2004, the first anniversary of the date of grant.</footnote>
        <footnote id="F19">Option to buy 10,000 shares of common stock, exercisable in four annual increments of 2,500 each beginning on 3/3/2005, the first anniversary of the date of grant.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Christopher J. MacKrell by power of attorney filed herewith</signatureName>
        <signatureDate>2006-03-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
