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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 R2DzKxh8CQgMjyrM2eTYMFW9Yrwu0mIMVkbe1mcnB9rTBwRRY25sx0tW2N61Wj2W
 QWdWWM+sDFF72Gt/c3+5Zg==

<SEC-DOCUMENT>0001265287-10-000005.txt : 20100122
<SEC-HEADER>0001265287-10-000005.hdr.sgml : 20100122
<ACCEPTANCE-DATETIME>20100122160107
ACCESSION NUMBER:		0001265287-10-000005
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100122
FILED AS OF DATE:		20100122
DATE AS OF CHANGE:		20100122

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:			DOOLEY RICHARD G
		CENTRAL INDEX KEY:			0001019553

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14947
		FILM NUMBER:		10542114

	MAIL ADDRESS:	
		STREET 1:		C/O JEFFERIES & COMPANY, INC.
		STREET 2:		520 MADISON AVE., 12TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-01-22</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001019553</rptOwnerCik>
            <rptOwnerName>DOOLEY RICHARD G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O JEFFERIES &amp; COMPANY, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>520 MADISON AVE., 12TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-01-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>50000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>27.021</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>429104</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Weighted average price based on the following transactions:  20,190 at $27.0000; 200 at $27.0025; 2,600 at $27.0050; 1,600 at $27.0100; 600 at $27.0125; 200 at $27.0150; 100 at $27.0175; 2,160 at $27.0200; 2,100 at $27.0250; 100 at $27.0275; 1,500 at $27.0300; 800 at $27.0350; 7,400 at $27.0400; 3,100 at $27.0450; 3,600 at $27.0500; 700 at $27.0550; and 3,050 at $27.0600.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Roland T. Kelly, by power of attorney</signatureName>
        <signatureDate>2010-01-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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