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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 NPpjKqDsP5yw9ATPCAm5o+a1B7GtYZdy0zrGrEntY2kXVTXgxfCjUB6OwGqV00fg
 K7EpuYfzxO7AZkKAt+OtaA==

<SEC-DOCUMENT>0001040987-05-000001.txt : 20050504
<SEC-HEADER>0001040987-05-000001.hdr.sgml : 20050504
<ACCEPTANCE-DATETIME>20050504141027
ACCESSION NUMBER:		0001040987-05-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050503
FILED AS OF DATE:		20050504
DATE AS OF CHANGE:		20050504

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PERFORMANCE TECHNOLOGIES INC \DE\
		CENTRAL INDEX KEY:			0001003950
		STANDARD INDUSTRIAL CLASSIFICATION:	PRINTED CIRCUIT BOARDS [3672]
		IRS NUMBER:				161158413
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		205 INDIGO CREEK DRIVE
		CITY:			ROCHESTER
		STATE:			NY
		ZIP:			14626
		BUSINESS PHONE:		5852560200

	MAIL ADDRESS:	
		STREET 1:		205 INDIGO CREEK DRIVE
		STREET 2:		205 INDIGO CREEK DRIVE
		CITY:			ROCHESTER
		STATE:			NY
		ZIP:			14626

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MAGINNESS CHARLES E
		CENTRAL INDEX KEY:			0001040987
		STANDARD INDUSTRIAL CLASSIFICATION:	PRINTED CIRCUIT BOARDS [3672]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27460
		FILM NUMBER:		05798304

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		7162560200

	MAIL ADDRESS:	
		STREET 2:		315 SCIENCE PARKWAY
		CITY:			ROCHESTER
		STATE:			NY
		ZIP:			14620
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-05-03</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001003950</issuerCik>
        <issuerName>PERFORMANCE TECHNOLOGIES INC \DE\</issuerName>
        <issuerTradingSymbol>PTIX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001040987</rptOwnerCik>
            <rptOwnerName>MAGINNESS CHARLES E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1></rptOwnerStreet1>
            <rptOwnerStreet2>205 INDIGO CREEK DRIVE</rptOwnerStreet2>
            <rptOwnerCity>ROCHESTER</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>14626</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $.01 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2005-05-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>16282</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.05</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>614142</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">520,895 shares are owned directly by Mr. Maginness.  93,247 shares are owned by Mr. Maginness' wife.  Mr. Maginness disclaims beneficial ownership of these shares.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Donald L. Turrell, by power of attorney, on behalf of Charles E. Maginness</signatureName>
        <signatureDate>2005-05-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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