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    <filerInfo>
      <liveTestFlag>LIVE</liveTestFlag>
      <filer>
        <credentials>
          <cik>0000937760</cik>
          <ccc>XXXXXXXX</ccc>
        </credentials>
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      <periodOfReport>03-31-2023</periodOfReport>
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    <coverPage>
      <reportCalendarOrQuarter>03-31-2023</reportCalendarOrQuarter>
      <isAmendment>false</isAmendment>
      <filingManager>
        <name>SUMITOMO LIFE INSURANCE CO</name>
        <address>
          <com:street1>2-2-1, YAESU, CHUO-KU</com:street1>
          <com:city>TOKYO</com:city>
          <com:stateOrCountry>M0</com:stateOrCountry>
          <com:zipCode>104-8430</com:zipCode>
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      </filingManager>
      <reportType>13F COMBINATION REPORT</reportType>
      <form13FFileNumber>028-04674</form13FFileNumber>
      <otherManagersInfo>
        <otherManager>
          <cik>0001403385</cik>
          <form13FFileNumber>028-17231</form13FFileNumber>
          <name>Symetra Financial CORP</name>
        </otherManager>
      </otherManagersInfo>
      <provideInfoForInstruction5>N</provideInfoForInstruction5>
    </coverPage>
    <signatureBlock>
      <name>Hiroyuki Fujiwara</name>
      <title>Manager</title>
      <phone>81-3-6664-8273</phone>
      <signature>/s/ Hiroyuki Fujiwara</signature>
      <city>Tokyo</city>
      <stateOrCountry>M0</stateOrCountry>
      <signatureDate>04-25-2023</signatureDate>
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