<SUBMISSION>
<ACCESSION-NUMBER>0000012355-06-000102
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>2
<PERIOD>20060419
<FILING-DATE>20060421
<DATE-OF-FILING-DATE-CHANGE>20060421
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>BLACK & DECKER CORP
<CIK>0000012355
<ASSIGNED-SIC>3540
<IRS-NUMBER>520248090
<STATE-OF-INCORPORATION>MD
<FISCAL-YEAR-END>1205
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>701 E JOPPA RD
<CITY>TOWSON
<STATE>MD
<ZIP>21286
<PHONE>4107163900
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>701 EAST JOPPA ROAD
<STREET2>MAIL STOP TW 290
<CITY>TOWSON
<STATE>MD
<ZIP>21286
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>BLACK & DECKER MANUFACTURING CO
<DATE-CHANGED>19850206
</FORMER-COMPANY>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Rowan Robert I
<CIK>0001353711
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>333-03593
<FILM-NUMBER>06772998
</FILING-VALUES>
<BUSINESS-ADDRESS>
<PHONE>410-716-3990
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>701 EAST JOPPA ROAD
<CITY>TOWSON
<STATE>MD
<ZIP>21286
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-04-19</periodOfReport>

    <issuer>
        <issuerCik>0000012355</issuerCik>
        <issuerName>BLACK &amp; DECKER CORP</issuerName>
        <issuerTradingSymbol>BDK</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001353711</rptOwnerCik>
            <rptOwnerName>Rowan Robert I</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O THE BLACK &amp; DECKER CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>701 EAST JOPPA ROAD</rptOwnerStreet2>
            <rptOwnerCity>TOWSON</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>21286</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2006-04-19</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3575</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>92.355</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2006-04-19</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>8000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2016-04-18</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>8000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">These shares were granted to the reporting person under The Black &amp; Decker Corporation 2004 Restricted Stock Plan and are subject to certain vesting requirements.</footnote>
        <footnote id="F2">The options vest in four equal annual installments beginning one year from the date of grant.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Natalie A. Shields, Attorney-in-Fact</signatureName>
        <signatureDate>2006-04-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>rirpoa.htm
<TEXT>
<HTML><BODY><PRE>                                   POWER OF ATTORNEY



     I hereby constitute and appoint Charles E. Fenton, Natalie A. Shields and Lucy P. Bosley, and each of them, with power of substitution, my true and lawful attorneys-in-fact with full power to sign and file for me, in my name and in my capacity as an officer of The Black & Decker Corporation (the "Corporation"), any and all reports, forms, documents and other information required to be filed with the Securities and Exchange Commission (or any national securities exchange on which the Corporation's securities are listed) pursuant to the provisions of Section 16 of the Securities Exchange Act of 1934, as it may be amended from time to time.  The authority of my attorneys-in-fact under this Power of Attorney shall continue until I am no longer required to file reports, forms, documents or other information pursuant to Section 16 in respect of any ownership of or transactions in securities of the Corporation, unless earlier revoked in writing.





     WITNESS my signature this 6th day of April, 2006.







                                     /s/ ROBERT I. ROWAN





Signatures of Attorneys-in-Fact:





/s/ CHARLES E. FENTON





/s/ NATALIE A. SHIELDS





/s/ LUCY P. BOSLEY</PRE></BODY></HTML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
