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    <submissionType>13F-HR</submissionType>
    <filerInfo>
      <liveTestFlag>LIVE</liveTestFlag>
      <flags>
        <confirmingCopyFlag>false</confirmingCopyFlag>
        <returnCopyFlag>true</returnCopyFlag>
        <overrideInternetFlag>false</overrideInternetFlag>
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      <filer>
        <credentials>
          <cik>0001571556</cik>
          <ccc>XXXXXXXX</ccc>
        </credentials>
      </filer>
      <periodOfReport>12-31-2018</periodOfReport>
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    <coverPage>
      <reportCalendarOrQuarter>12-31-2018</reportCalendarOrQuarter>
      <filingManager>
        <name>Pure Financial Advisors, Inc.</name>
        <address>
          <com:street1>3131 CAMINO DEL RIO N</com:street1>
          <com:street2>STE 1550</com:street2>
          <com:city>SAN DIEGO</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>92108</com:zipCode>
        </address>
      </filingManager>
      <reportType>13F HOLDINGS REPORT</reportType>
      <form13FFileNumber>028-15445</form13FFileNumber>
      <provideInfoForInstruction5>N</provideInfoForInstruction5>
    </coverPage>
    <signatureBlock>
      <name>Benjamin S. Littman</name>
      <title>Director of Trading</title>
      <phone>619-814-4100</phone>
      <signature>Benjamin S. Littman</signature>
      <city>San Diego</city>
      <stateOrCountry>CA</stateOrCountry>
      <signatureDate>01-11-2019</signatureDate>
    </signatureBlock>
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      <otherIncludedManagersCount>0</otherIncludedManagersCount>
      <tableEntryTotal>146</tableEntryTotal>
      <tableValueTotal>493182</tableValueTotal>
      <isConfidentialOmitted>false</isConfidentialOmitted>
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