<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001161707</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>


    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000076334</issuerCik>
      <issuerName>PARKER HANNIFIN CORP</issuerName>
      <secFileNumber>001-04982</secFileNumber>
      <issuerAddress>
        <com:street1>6035 PARKLAND BOULEVARD</com:street1>
        <com:city>CLEVELAND</com:city>
        <com:stateOrCountry>OH</com:stateOrCountry>
        <com:zipCode>44124-4141</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>2168963000</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>BANKS LEE C</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Kestra</name>
        <address>
          <com:street1>5707 Southwest Pkwy Bldg 2 Ste 40</com:street1>
          <com:city>Austin</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>78735</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>23638</noOfUnitsSold>
      <aggregateMarketValue>9625000.00</aggregateMarketValue>
      <noOfUnitsOutstanding>128410000</noOfUnitsOutstanding>
      <approxSaleDate>08/04/2023</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>04/27/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Stock award</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Parker Hannifin</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>16023</amountOfSecuritiesAcquired>
      <paymentDate>04/27/2022</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>08/17/2021</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Award</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Parker Hannifin</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>7615</amountOfSecuritiesAcquired>
      <paymentDate>08/17/2021</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>08/04/2023</noticeDate>
      <signature>/s/ Christian Nasser, as a duly authorized representative of National Financial Services LLC, as attorney-in-fact for Lee Banks</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
