<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/nport" xmlns:com="http://www.sec.gov/edgar/common" xmlns:ncom="http://www.sec.gov/edgar/nportcommon" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sec.gov/edgar/nport eis_NPORT_Filer.xsd">
  <headerData>
    <submissionType>NPORT-P</submissionType>
    <isConfidential>false</isConfidential>
    <filerInfo>

      <filer>
        <issuerCredentials>
          <cik>0000031266</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


      <seriesClassInfo>
        <seriesId>S000012344</seriesId>
        <classId>C000033565</classId>
        <classId>C000075110</classId>
      </seriesClassInfo>


    </filerInfo>
  </headerData>
  <formData>
    <genInfo>
      <regName>Eaton Vance Special Investment Trust</regName>
      <regFileNumber>811-01545</regFileNumber>
      <regCik>0000031266</regCik>
      <regLei>5493003X08Y3GH1CDY86</regLei>
      <regStreet1>One Post Office Square</regStreet1>
      <regCity>BOSTON</regCity>
      <regStateConditional regCountry="US" regState="US-MA"/>
      <regZipOrPostalCode>02109</regZipOrPostalCode>
      <regPhone>617-482-8260</regPhone>
      <seriesName>Eaton Vance Core Bond Fund</seriesName>
      <seriesId>S000012344</seriesId>
      <seriesLei>549300YLYACGLDNIL933</seriesLei>
      <repPdEnd>2025-12-31</repPdEnd>
      <repPdDate>2025-03-31</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>272879251.68</totAssets>
      <totLiabs>1053195.18</totLiabs>
      <netAssets>271826056.50</netAssets>
      <assetsAttrMiscSec>0.00000000</assetsAttrMiscSec>
      <assetsInvested>0.00000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.00000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.00000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.00000000</amtPayOneYrOthAffil>
      <amtPayOneYrOther>0.00000000</amtPayOneYrOther>
      <amtPayAftOneYrBanksBorr>0.00000000</amtPayAftOneYrBanksBorr>
      <amtPayAftOneYrCtrldComp>0.00000000</amtPayAftOneYrCtrldComp>
      <amtPayAftOneYrOthAffil>0.00000000</amtPayAftOneYrOthAffil>
      <amtPayAftOneYrOther>0.00000000</amtPayAftOneYrOther>
      <delayDeliv>0.00000000</delayDeliv>
      <standByCommit>0.00000000</standByCommit>
      <liquidPref>0.00000000</liquidPref>
      <cshNotRptdInCorD>0.00000000</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000033565" rtn1="0.84000000" rtn2="2.11000000" rtn3="0.02000000"/>
          <monthlyTotReturn classId="C000075110" rtn1="0.70000000" rtn2="2.09000000" rtn3="0.00000000"/>
        </monthlyTotReturns>
        <othMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
        <othMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
        <othMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
      </returnInfo>
      <mon1Flow redemption="5819502.56000000" reinvestment="763033.66000000" sales="39386715.28000000"/>
      <mon2Flow redemption="6369648.72000000" reinvestment="832214.51000000" sales="21485960.00000000"/>
      <mon3Flow redemption="10531287.08000000" reinvestment="887759.83000000" sales="9903049.74000000"/>

      <varInfo>

        <fundsDesignatedInfo>
          <nameDesignatedIndex>Securities Portfolio</nameDesignatedIndex>
          <indexIdentifier>Securities Portfolio</indexIdentifier>

        </fundsDesignatedInfo>

      </varInfo>
    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>Core Bond Portfolio</name>
        <lei>3BIRQP3EJTB29FBSFZ15</lei>
        <title>Core Bond Portfolio</title>
        <cusip>000000000</cusip>
        <identifiers>
          <other otherDesc="Internal Identifier" value="FP2A_MASTER"/>
        </identifiers>
        <balance>13200783.12000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>272860187.02000000</valUSD>
        <pctVal>100.3804383337</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>N/A</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <explntrNotes>

      <explntrNote note="Monthly returns presented in Item B.5(a) have been calculated without deducting any applicable sales loads or redemption fees." noteItem="B.5.a"/>
    </explntrNotes>
    <signature>
      <ncom:dateSigned>2025-04-29</ncom:dateSigned>
      <ncom:nameOfApplicant>Eaton Vance Special Investment Trust</ncom:nameOfApplicant>
      <ncom:signature>James Kirchner</ncom:signature>
      <ncom:signerName>James Kirchner</ncom:signerName>
      <ncom:title>Treasurer</ncom:title>
    </signature>
  </formData>
  <documents>XXXX</documents>
</edgarSubmission>
