<?xml version="1.0" encoding="UTF-8"?>
<edgarSubmission xsi:schemaLocation="http://www.sec.gov/edgar/thirteenffiler eis_13F_Filer.xsd" xmlns:ns1="http://www.sec.gov/edgar/common" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.sec.gov/edgar/thirteenffiler">
  <schemaVersion>X0202</schemaVersion>
  <headerData>
    <submissionType>13F-NT</submissionType>
    <filerInfo>
      <liveTestFlag>LIVE</liveTestFlag>
      <flags/>
      <filer>
        <credentials>
          <cik>0001687968</cik>
          <ccc>XXXXXXXX</ccc>
        </credentials>
      </filer>
      <periodOfReport>06-30-2025</periodOfReport>
    </filerInfo>
  </headerData>
  <formData>
    <coverPage>
      <reportCalendarOrQuarter>06-30-2025</reportCalendarOrQuarter>
      <isAmendment>false</isAmendment>
      <filingManager>
        <name>Bain Capital Life Sciences Fund, L.P.</name>
        <address>
          <ns1:street1>200 Clarendon Street </ns1:street1>
          <ns1:city>Boston</ns1:city>
          <ns1:stateOrCountry>MA</ns1:stateOrCountry>
          <ns1:zipCode>02116</ns1:zipCode>
        </address>
      </filingManager>
      <reportType>13F NOTICE</reportType>
      <form13FFileNumber>028-18478</form13FFileNumber>
      <otherManagersInfo>
        <otherManager>
          <form13FFileNumber>28-18477</form13FFileNumber>
          <name>Bain Capital Life Sciences Investors, LLC</name>
        </otherManager>
        <otherManager>
          <form13FFileNumber>28-18476</form13FFileNumber>
          <name>Bain Capital Life Sciences Partners, LP</name>
        </otherManager>
      </otherManagersInfo>
      <provideInfoForInstruction5>Y</provideInfoForInstruction5>
      <additionalInformation>The report on Form 13F for the period ended June 30, 2025 for Bain Capital Life Sciences Fund, L.P. (the "Fund") is being filed by Bain Capital Life Sciences Investors, LLC, which is the general partner of Bain Capital Life Sciences Partners, LP, which is the general partner of the Fund. </additionalInformation>
    </coverPage>
    <signatureBlock>
      <name>Adam Koppel</name>
      <title>Partner of Bain Capital Life Sciences Investors, LLC</title>
      <phone>617-516-2000</phone>
      <signature>/s/ Adam Koppel</signature>
      <city>Boston </city>
      <stateOrCountry>MA</stateOrCountry>
      <signatureDate>08-14-2025</signatureDate>
    </signatureBlock>
  </formData>
</edgarSubmission>
