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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,
 WU1jMQx3pWaGKgTvD7hVA5QTOKm0sT7vaVUZuUTFAUxbbHU1bgeVnHIQl3DhsLQH
 j8L+6rlVtLIt+xLzTC/Nog==

<SEC-DOCUMENT>0000050341-03-000162.txt : 20031002
<SEC-HEADER>0000050341-03-000162.hdr.sgml : 20031002
<ACCEPTANCE-DATETIME>20031002160330
ACCESSION NUMBER:		0000050341-03-000162
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031001
FILED AS OF DATE:		20031002

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BURNHAM DANIEL P
		CENTRAL INDEX KEY:			0001193444

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-16431
		FILM NUMBER:		03924445

	BUSINESS ADDRESS:	
		STREET 1:		141 SPRING STREET
		CITY:			LEXINGTON
		STATE:			MA
		ZIP:			02421

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FLEETBOSTON FINANCIAL CORP
		CENTRAL INDEX KEY:			0000050341
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				050341324
		STATE OF INCORPORATION:			RI
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		100 FEDERAL STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
		BUSINESS PHONE:		6174342200

	MAIL ADDRESS:	
		STREET 1:		100 FEDERAL STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FLEET BOSTON CORP
		DATE OF NAME CHANGE:	19991001

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FLEET NORSTAR FINANCIAL GROUP INC
		DATE OF NAME CHANGE:	19920525

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FLEET FINANCIAL GROUP INC
		DATE OF NAME CHANGE:	19880110
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-10-01</periodOfReport>
    <issuer>
        <issuerCik>0000050341</issuerCik>
        <issuerName>FLEETBOSTON FINANCIAL CORP</issuerName>
        <issuerTradingSymbol>FBF</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001193444</rptOwnerCik>
            <rptOwnerName>BURNHAM DANIEL P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1></rptOwnerStreet1>
            <rptOwnerStreet2>6284 SAN MARCOS PASS</rptOwnerStreet2>
            <rptOwnerCity>SANTA BARBARA</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>93105-9775</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><securityTitle><value>Stock Units</value></securityTitle><conversionOrExercisePrice><footnoteId id="F1"/></conversionOrExercisePrice><transactionDate><value>2003-10-01</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>801.539</value></transactionShares><transactionPricePerShare><value>31.19</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><footnoteId id="F1"/></exerciseDate><expirationDate><footnoteId id="F1"/></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSe
curityShares><value>801.539</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>14033.9186</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Stock Units</value></securityTitle><conversionOrExercisePrice><footnoteId id="F1"/></conversionOrExercisePrice><transactionDate><value>2003-10-01</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>I</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>136.5344</value></transactionShares><transactionPricePerShare><value>31.19</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></trans
actionAmounts><exerciseDate><footnoteId id="F1"/></exerciseDate><expirationDate><footnoteId id="F1"/></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>136.5344</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>14170.453</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">Stock units are payable, 1 for 1, in shares of FBF common stock upon the reporting person's retirement or resignation from the Board of Directors.</footnote></footnotes><remarks/><ownerSignature><signatureName>Martha R. Francis,  Attorney-in-Fact for Daniel P. Burnham</signatureName><signatureDate>2003-10-02</signatureDate></ownerSignature></ow
nershipDocument>

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