<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-12-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000819539</issuerCik>
        <issuerName>NEIMAN MARCUS GROUP INC</issuerName>
        <issuerTradingSymbol>NMG.B</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001015225</rptOwnerCik>
            <rptOwnerName>SMITH ROBERT A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>GOULSTON &amp; STORRS, P.C.</rptOwnerStreet1>
            <rptOwnerStreet2>400 ATLANTIC AVENUE--ATTN: MARK BALK</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02110-3333</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle>co-Vice Chairman</officerTitle>
            <otherText>Member of Schedule 13D group</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class B Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-12-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>G</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1050</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>62.83</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>175463</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class B Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>251145</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>see footnotes</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents (1) a gift of 350 shares by the reporting person to Robert A. Smith and Dana Weiss 1994 Childrens Trust udt dated December 1, 1994 fbo Madeleine W. Smith, of which Dana A. Weiss and Mark D. Balk are trustees; (2) a gift of 350 shares by the reporting person to Robert A. Smith and Dana Weiss 1994 Childrens Trust udt dated December 1, 1994 fbo Ryan A. Smith, of which Dana A. Weiss and Mark D. Balk are trustees; and (3) a gift of 350 shares by the reporting person to Robert A. Smith and Dana Weiss 1994 Childrens Trust udt dated December 1, 1994 fbo Jackson A. Smith, of which Dana A. Weiss and Mark D. Balk are trustees.</footnote>
        <footnote id="F2">Reflects the shares owned directly or indirectly by the following persons or entities and indirectly by the reporting person:  39,091 shares owned indirectly as a trustee of the Susan F. Smith Grantor Retained Annuity Trust  5 Years udt dated September 1, 1998 fbo Robert A. Smith; 28,997 shares owned indirectly as a trustee of the Susan F. Smith Grantor Retained Annuity Trust  7 Years  udt dated August 10, 1994 fbo Robert A. Smith;</footnote>
        <footnote id="F3">4,741 shares owned indirectly by Dana A. Weiss, the wife of the reporting person, as a trustee of the Robert A. Smith and Dana Weiss 1994 Childrens Trust fbo Madeleine W. Smith; 4,741 shares owned indirectly by Dana A. Weiss as a trustee of the Robert A. Smith and Dana Weiss 1994 Childrens Trust fbo Ryan A. Smith; 4,741 shares owned indirectly by Dana A. Weiss as a trustee of the Robert A. Smith and Dana Weiss 1994 Childrens Trust fbo Jackson A. Smith; 52,360 shares owned indirectly by Robert A. Smith and Dana A. Weiss as trustees of the Robert A. Smith Grantor Retained Annuity Trust; 16,069 shares owned indirectly by Dana A. Weiss as a trustee of the Robert A. Smith 1998 Grantor Retained Annuity Trust fbo Jackson A. Smith; 16,070 shares owned indirectly by Dana A. Weiss as a trustee of the Robert A. Smith 1998 Grantor Retained Annuity Trust fbo Madeleine W. Smith;</footnote>
        <footnote id="F4">16,069 shares owned indirectly by Dana A. Weiss as a trustee of the Robert A. Smith 1998 Grantor Retained Annuity Trust fbo Ryan A. Smith; 48,208 shares owned indirectly by the reporting person as a trustee for the Robert A. Smith 1978 Insurance Trust; 6,686 shares owned indirectly by Richard A. Smith and Dana A. Weiss as guardians of the property of Madeleine W. Smith, the daughter of the reporting person; 6,686 shares owned indirectly by Richard A. Smith and Dana A. Weiss as guardians of the property of Ryan A. Smith, the son of the reporting person; and 6,686 shares owned indirectly by Richard A. Smith and Dana A. Weiss as guardians of the property of Jackson A. Smith, the son of the reporting person.  The reporting person disclaims beneficial ownership of 82,489 of these shares, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Mark D. Balk, Attorney-in-Fact</signatureName>
        <signatureDate>2004-12-02</signatureDate>
    </ownerSignature>
</ownershipDocument>

