-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 G+tVkv8/fwqxwXufNv+COGJq0MsgPXyYuvHXLsXitNJvYJwUb6ZyEziuWvcqV8e8
 ExL3FJ2w3YBBYu/Bm1dsWQ==

<SEC-DOCUMENT>0001179110-03-000650.txt : 20030506
<SEC-HEADER>0001179110-03-000650.hdr.sgml : 20030506
<ACCEPTANCE-DATETIME>20030506153725
ACCESSION NUMBER:		0001179110-03-000650
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030505
FILED AS OF DATE:		20030506

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BEST BUY CO INC
		CENTRAL INDEX KEY:			0000764478
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-RADIO TV & CONSUMER ELECTRONICS STORES [5731]
		IRS NUMBER:				410907483
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			0301

	BUSINESS ADDRESS:	
		STREET 1:		7075 FLYING CLOUD DR
		CITY:			EDIN PRARIE
		STATE:			MN
		ZIP:			55344
		BUSINESS PHONE:		6129472000

	MAIL ADDRESS:	
		STREET 1:		P O BOX 9312
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55440-9312

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BEST BUYS CO INC
		DATE OF NAME CHANGE:	19900809

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TRESTMAN FRANK D
		CENTRAL INDEX KEY:			0001191198

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09595
		FILM NUMBER:		03684249

	MAIL ADDRESS:	
		STREET 1:		C/O BEST BUY INC
		STREET 2:		7075 FLYING CLOUD DR
		CITY:			EDEN PRAIRIE
		STATE:			MN
		ZIP:			55344
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -2003-05-05
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument>    <schemaVersion>X0101</schemaVersion><documentType>4</documentType><periodOfReport>2003-05-05</periodOfReport><notSubjectToSection16>1</notSubjectToSection16><issuer><issuerCik>0000764478</issuerCik>        <issuerName>BEST BUY CO INC</issuerName><issuerTradingSymbol>BBY</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001191198</rptOwnerCik>            <rptOwnerName>TRESTMAN FRANK D</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><officerTitle></officerTitle><otherText></otherText></reportingOwnerRelationship></repo
rtingOwner><nonDerivativeSecurity><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-05-05</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F1"/></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>35000</value></transactionShares><transactionValue><value>35.00</value></transactionValue><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>156850</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeSecurity><footnotes><footnote id="F1">The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan establ
ished by the reporting person on April 24, 2003.</footnote></footnotes><ownerSignature><signatureName>/s/ Nancy J. Wigchers</signatureName><signatureDate>2003-05-06</signatureDate></ownerSignature></ownershipDocument>

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