-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Dkznemglqt+oQqqgrlpW3Wwk45WoagnjLfV7EaTLzPH1hDCGvIo513eCUeNUD770
 Ex02dreVx7qGHmO0YftHrw==

<SEC-DOCUMENT>0001231003-04-000002.txt : 20040122
<SEC-HEADER>0001231003-04-000002.hdr.sgml : 20040122
<ACCEPTANCE-DATETIME>20040122112428
ACCESSION NUMBER:		0001231003-04-000002
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040120
FILED AS OF DATE:		20040122

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			JEFFERIES GROUP INC /DE/
		CENTRAL INDEX KEY:			0001084580
		STANDARD INDUSTRIAL CLASSIFICATION:	SECURITY BROKERS, DEALERS & FLOTATION COMPANIES [6211]
		IRS NUMBER:				954719745
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		520 MADISON AVENUE
		STREET 2:		12TH FLOOR
		CITY:			NEW  YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		212-284-2550

	MAIL ADDRESS:	
		STREET 1:		520 MADISON AVENUE
		STREET 2:		12TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	JEF HOLDING CO INC
		DATE OF NAME CHANGE:	19990419

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SYRJAMAKI MAXINE
		CENTRAL INDEX KEY:			0001231003

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14947
		FILM NUMBER:		04536892

	BUSINESS ADDRESS:	
		STREET 1:		11100 SANTA MONICA BLVD 12TH FL
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			20025
		BUSINESS PHONE:		3109146034

	MAIL ADDRESS:	
		STREET 1:		JEFFERIES GROUP INC
		STREET 2:		11100 SANTA MONICA BLVD 12TH FL
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			20025
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-01-20</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001084580</issuerCik>
        <issuerName>JEFFERIES GROUP INC /DE/</issuerName>
        <issuerTradingSymbol>JEF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001231003</rptOwnerCik>
            <rptOwnerName>SYRJAMAKI MAXINE</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O JEFFERIES &amp; COMPANY, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>520 MADISON AVE., 12TH FL</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Controller</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>

        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-01-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1211</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>41894</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>

    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Acquisition of shares under the Jefferies Group, Inc. 2003 Incentive Compensation Plan for no cash consideration in a transaction exempt under Rule 16b-3(d) under the Securities Exchange Act of 1934, as amended.</footnote>
        <footnote id="F2">Does not include 78,315 shares indirectly held by the Reporting Person by the Trustee of the Jefferies Group, Inc. Employees' Stock Ownership Plan for the benefit of the Reporting Person, and does not include 27,713 shares indirectly held by the Reporting Person by the Trustee under the Jefferies Group, Inc. Profit Sharing Plan for the benefit of the Reporting Person.</footnote>
    </footnotes>


    <ownerSignature>
        <signatureName>/s/ Roland T. Kelly, by Power of Attorney</signatureName>
        <signatureDate>2004-01-22</signatureDate>
    </ownerSignature>

</ownershipDocument>

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