-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 RZwOUylt1ROJRnJwshT5xw==

<SEC-DOCUMENT>0001140361-03-004171.txt : 20031105
<SEC-HEADER>0001140361-03-004171.hdr.sgml : 20031105
<ACCEPTANCE-DATETIME>20031105160245
ACCESSION NUMBER:		0001140361-03-004171
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031105
FILED AS OF DATE:		20031105

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WHITE JEFFREY D
		CENTRAL INDEX KEY:			0001206510
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14092
		FILM NUMBER:		03979613

	BUSINESS ADDRESS:	
		STREET 1:		C/O BOSTON BEER CO
		STREET 2:		75 ARLINGTON STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		6173685035

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BOSTON BEER CO INC
		CENTRAL INDEX KEY:			0000949870
		STANDARD INDUSTRIAL CLASSIFICATION:	MALT BEVERAGES [2082]
		IRS NUMBER:				043284048
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1226

	BUSINESS ADDRESS:	
		STREET 1:		75 ARLINGTON ST
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		6174821332

	MAIL ADDRESS:	
		STREET 1:		75 ARLINGTON ST
		STREET 2:		5TH FL
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>
<periodOfReport>2003-11-05</periodOfReport>
<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000949870</issuerCik>
        <issuerName>BOSTON BEER CO INC</issuerName>
        <issuerTradingSymbol>SAM</issuerTradingSymbol>
</issuer>
<reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001206510</rptOwnerCik>
            <rptOwnerName>WHITE JEFFREY D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O BOSTON BEER COMPANY</rptOwnerStreet1>
            <rptOwnerStreet2>75 ARLINGTON STREET</rptOwnerStreet2>
            <rptOwnerCity>BOSTON, MA</rptOwnerCity>
            <rptOwnerState>X1</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector>
<isOfficer>1</isOfficer>
<isTenPercentOwner>0</isTenPercentOwner>
<isOther>0</isOther>
<officerTitle>Chief Operating Officer</officerTitle>
<otherText></otherText>
</reportingOwnerRelationship>
</reportingOwner>
<nonDerivativeTable>
<nonDerivativeTransaction>
<securityTitle>
<value>Class A Common</value>
</securityTitle>
<transactionDate>
<value>2003-11-05</value>
</transactionDate>
<deemedExecutionDate>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness>
<value></value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>4000</value>
</transactionShares>
<transactionPricePerShare>
<value>8.8437</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
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</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>4000</value>
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<ownershipNature>
<directOrIndirectOwnership>
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<value></value>
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<nonDerivativeTransaction>
<securityTitle>
<value>Class A Common</value>
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<transactionDate>
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<deemedExecutionDate>
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<transactionCoding>
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<equitySwapInvolved>0</equitySwapInvolved>
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<transactionTimeliness>
<value></value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>2000</value>
</transactionShares>
<transactionPricePerShare>
<value>11.7622</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>6000</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
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<natureOfOwnership>
<value></value>
</natureOfOwnership>
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</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Class A Common</value>
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<transactionDate>
<value>2003-11-05</value>
</transactionDate>
<deemedExecutionDate>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
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<transactionTimeliness>
<value></value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>3600</value>
</transactionShares>
<transactionPricePerShare>
<value>7.1562</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
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</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>9600</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
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<natureOfOwnership>
<value></value>
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</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Class A Common</value>
</securityTitle>
<transactionDate>
<value>2003-11-05</value>
</transactionDate>
<deemedExecutionDate>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
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<transactionTimeliness>
<value></value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>3000</value>
</transactionShares>
<transactionPricePerShare>
<value>8.4375</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>12600</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value></value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Class A Common</value>
</securityTitle>
<transactionDate>
<value>2003-11-05</value>
</transactionDate>
<deemedExecutionDate>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>S</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness>
<value></value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>12600</value>
</transactionShares>
<transactionPricePerShare>
<value>17.062</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>0</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value></value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeTransaction>
</nonDerivativeTable>
<derivativeTable>
<derivativeTransaction>
<securityTitle>
<value>Stock Option (Right to Buy)</value>
</securityTitle>
<conversionOrExercisePrice>
<value>8.4375</value>
</conversionOrExercisePrice>
<transactionDate>
<value>2003-11-05</value>
</transactionDate>
<deemedExecutionDate>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness>
<value></value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>3000</value>
</transactionShares>
<transactionPricePerShare>
<value>8.4375</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<exerciseDate>
<footnoteId id="F1"/>
</exerciseDate>
<expirationDate>
<value>2008-12-31</value>
</expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Class A Common</value>
</underlyingSecurityTitle>
<underlyingSecurityShares>
<value>15000</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>3000</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value></value>
</natureOfOwnership>
</ownershipNature>
</derivativeTransaction>
<derivativeTransaction>
<securityTitle>
<value>Stock Option (Right to Buy)</value>
</securityTitle>
<conversionOrExercisePrice>
<value>7.1562</value>
</conversionOrExercisePrice>
<transactionDate>
<value>2003-11-05</value>
</transactionDate>
<deemedExecutionDate>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness>
<value></value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>3600</value>
</transactionShares>
<transactionPricePerShare>
<value>7.1562</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<exerciseDate>
<footnoteId id="F2"/>
</exerciseDate>
<expirationDate>
<value>2009-12-31</value>
</expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Class A Common</value>
</underlyingSecurityTitle>
<underlyingSecurityShares>
<value>18000</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>7200</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value></value>
</natureOfOwnership>
</ownershipNature>
</derivativeTransaction>
<derivativeTransaction>
<securityTitle>
<value>Stock Option (Right to Buy)</value>
</securityTitle>
<conversionOrExercisePrice>
<value>11.7622</value>
</conversionOrExercisePrice>
<transactionDate>
<value>2003-11-05</value>
</transactionDate>
<deemedExecutionDate>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness>
<value></value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>2000</value>
</transactionShares>
<transactionPricePerShare>
<value>11.7622</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<exerciseDate>
<footnoteId id="F3"/>
</exerciseDate>
<expirationDate>
<value>2006-03-31</value>
</expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Class A Common</value>
</underlyingSecurityTitle>
<underlyingSecurityShares>
<value>2500</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>500</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value></value>
</natureOfOwnership>
</ownershipNature>
</derivativeTransaction>
<derivativeTransaction>
<securityTitle>
<value>Stock Option (Right to Buy)</value>
</securityTitle>
<conversionOrExercisePrice>
<value>8.8437</value>
</conversionOrExercisePrice>
<transactionDate>
<value>2003-11-05</value>
</transactionDate>
<deemedExecutionDate>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness>
<value></value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>4000</value>
</transactionShares>
<transactionPricePerShare>
<value>8.8437</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<exerciseDate>
<footnoteId id="F4"/>
</exerciseDate>
<expirationDate>
<value>2010-12-31</value>
</expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Class A Common</value>
</underlyingSecurityTitle>
<underlyingSecurityShares>
<value>20000</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>12000</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value></value>
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</ownershipNature>
</derivativeTransaction>
</derivativeTable>
<footnotes>
<footnote id="F1">Of these 15000 option shares, the remaining 3,000 will vest on 1/1/2004</footnote>
<footnote id="F2">Of these 18000 option shares, the remaing shares vest 3600 on 1/1/04 and 1/1/05</footnote>
<footnote id="F3">Of these 2500 option shares, the remain 500 will vest on 1/1/04</footnote>
<footnote id="F4">Of these 20000 option shares, 4000 vest on 1/1/04, 1/1/05 and 1/1/06</footnote>
</footnotes>
<remarks></remarks>
<ownerSignature>
<signatureName>Jeffrey D. White</signatureName>
<signatureDate>2003-11-05</signatureDate>
</ownerSignature>
</ownershipDocument>

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