-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 i1SK6QfHP5hdRE2kUZoEbw==

<SEC-DOCUMENT>0000076334-08-000035.txt : 20080506
<SEC-HEADER>0000076334-08-000035.hdr.sgml : 20080506
<ACCEPTANCE-DATETIME>20080506112002
ACCESSION NUMBER:		0000076334-08-000035
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080502
FILED AS OF DATE:		20080506
DATE AS OF CHANGE:		20080506

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PARKER HANNIFIN CORP
		CENTRAL INDEX KEY:			0000076334
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS FABRICATED METAL PRODUCTS [3490]
		IRS NUMBER:				340451060
		STATE OF INCORPORATION:			OH
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		6035 PARKLAND BOULEVARD
		CITY:			CLEVELAND
		STATE:			OH
		ZIP:			44124-4141
		BUSINESS PHONE:		2168963000

	MAIL ADDRESS:	
		STREET 1:		6035 PARKLAND BOULEVARD
		CITY:			CLEVELAND
		STATE:			OH
		ZIP:			44124-4141

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PARKER APPLIANCE CO
		DATE OF NAME CHANGE:	19670907

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MYSLENSKI JOHN D
		CENTRAL INDEX KEY:			0001049682

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-04982
		FILM NUMBER:		08805219

	BUSINESS ADDRESS:	
		STREET 1:		C/O PARKER HANIFIN CORP
		STREET 2:		6035 PARKLAND BLVD
		CITY:			CLEVELAND
		STATE:			OH
		ZIP:			44124
		BUSINESS PHONE:		2168962420

	MAIL ADDRESS:	
		STREET 1:		6035 PARKLAND BLVD
		CITY:			CLEVELAND
		STATE:			OH
		ZIP:			44124
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-05-02</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0000076334</issuerCik>
        <issuerName>PARKER HANNIFIN CORP</issuerName>
        <issuerTradingSymbol>PH</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001049682</rptOwnerCik>
            <rptOwnerName>MYSLENSKI JOHN D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PARKER-HANNIFIN CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>6035 PARKLAND BOULEVARD</rptOwnerStreet2>
            <rptOwnerCity>CLEVELAND</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>44124</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>301.002</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Parker Retirement Savings Plan</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2008-05-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>45286</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>81.565</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>146761</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Joseph R. Leonti, Attorney-in-Fact</signatureName>
        <signatureDate>2008-05-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----