-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0000009984-11-000030.txt : 20110225
<SEC-HEADER>0000009984-11-000030.hdr.sgml : 20110225
<ACCEPTANCE-DATETIME>20110225152406
ACCESSION NUMBER:		0000009984-11-000030
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20110224
FILED AS OF DATE:		20110225
DATE AS OF CHANGE:		20110225

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			O BRIEN LAWRENCE W
		CENTRAL INDEX KEY:			0001196441

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-04801
		FILM NUMBER:		11640663

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BARNES GROUP INC
		CENTRAL INDEX KEY:			0000009984
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS FABRICATED METAL PRODUCTS [3490]
		IRS NUMBER:				060247840
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		123 MAIN ST
		CITY:			BRISTOL
		STATE:			CT
		ZIP:			06010
		BUSINESS PHONE:		8605837070

	MAIL ADDRESS:	
		STREET 1:		123 MAIN ST
		CITY:			BRISTOL
		STATE:			CT
		ZIP:			06010

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ASSOCIATED SPRING CORP
		DATE OF NAME CHANGE:	19760518
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
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    <periodOfReport>2011-02-24</periodOfReport>

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        <issuerName>BARNES GROUP INC</issuerName>
        <issuerTradingSymbol>B</issuerTradingSymbol>
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            <rptOwnerStreet2>123 MAIN STREET</rptOwnerStreet2>
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            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06010</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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            <isTenPercentOwner>0</isTenPercentOwner>
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            </securityTitle>
            <conversionOrExercisePrice>
                <value>17.0875</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2011-02-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>4024</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F6"/>
            </exerciseDate>
            <expirationDate>
                <value>2011-10-10</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4024</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Includes balances of 699 Restricted Stock Units granted 2/14/07, 1132 granted 2/13/08, 3600 granted 2/10/09, 3862 granted 2/8/10 and 2100 granted 2/9/11, and balances of 566 Performance Share Awards granted 2/13/08 and 2100 granted 2/9/11, that are subject to forfeiture if certain events occur.</footnote>
        <footnote id="F2">The options vested 100% immediately on 11/17/2004.</footnote>
        <footnote id="F3">1 for 1.</footnote>
        <footnote id="F4">The options vested 100% immediately on 11/17/2003.</footnote>
        <footnote id="F5">The options vested 100% immediately on 5/17/2005.</footnote>
        <footnote id="F6">The options vested 100% immediately on 8/25/2005.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Monique B. Marchetti, pursuant to a Power of Atty</signatureName>
        <signatureDate>2011-02-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----