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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 CMZCMISi3arVxTjeyOmbQDBnMKGHfSiCiFXdYJeQRtWcyfF4DoDOHiYQyeJJKITv
 eBQBtfVfVrgTvgD23K2dcw==

<SEC-DOCUMENT>0001059243-03-000047.txt : 20030709
<SEC-HEADER>0001059243-03-000047.hdr.sgml : 20030709
<ACCEPTANCE-DATETIME>20030709170807
ACCESSION NUMBER:		0001059243-03-000047
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030707
FILED AS OF DATE:		20030709

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FABOZZI FRANK
		CENTRAL INDEX KEY:			0001075524

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-10543
		FILM NUMBER:		03780620

	BUSINESS ADDRESS:	
		STREET 1:		C/O BLACKROCK FINANCIAL MANAGEMENT INC.
		STREET 2:		40 EAST 52ND STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

	MAIL ADDRESS:	
		STREET 1:		C/O BLACKROCK FINANCIAL MANAGEMENT INC.
		STREET 2:		40 EAST 52ND STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK CORE BOND TRUST
		CENTRAL INDEX KEY:			0001160864
		IRS NUMBER:				522346891
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		345 PARK AVE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10154
		BUSINESS PHONE:		2127545300
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-07-07</periodOfReport>
    <issuer>
        <issuerCik>0001160864</issuerCik>
        <issuerName>BLACKROCK CORE BOND TRUST</issuerName>
        <issuerTradingSymbol>BHK</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId>
            <rptOwnerCik>0001075524</rptOwnerCik>
            <rptOwnerName>FABOZZI FRANK</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeSecurity><securityTitle><value>Performance Rights</value><footnoteId id="F1"/></securityTitle><conversionOrExercisePrice><value>0</value><footnoteId id="F2"/></conversionOrExercisePrice><transactionDate><value>2003-07-07</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>123</value></transactionShares><transactionValue><value>14.98</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>1988-08-08</value><footnoteId id="F3"/></exerciseDate><expirationDate><value>1988-08-08</value><footnoteId id="F3"/></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Commo
n Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>123</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>123</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeSecurity><footnotes><footnote id="F1">The phantom stock units were accrued under the BlackRock Funds Deferred Compensation Plan.</footnote><footnote id="F2">One performance right is convertible into the cash value of one share of common stock of BlackRock Core Bond Trust.</footnote><footnote id="F3">The units are to be settled 100% in cash at the end of the deferral period chosen by the reporting person.</footnote></footnotes><ownerSignature><signatureName>Bartholomew Battista</signatureName><signatureDate>2003-05-27</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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