<?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>0001298098</rptOwnerCik>
            <rptOwnerName>Weiss Dana A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MARK D. BALK, GOULSTON &amp; STORRS, PC</rptOwnerStreet1>
            <rptOwnerStreet2>400 ATLANTIC AVENUE</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02110</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <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>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>426608</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>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents (1) a gift of 350 to Robert A. Smith and Dana Weiss 1994 Childrens Trust udt dated December 1, 1994 fbo Jackson A. Smith, of which the reporting person and Mark D. Balk are trustees; (2) a gift of 350 to Robert A. Smith and Dana Weiss 1994 Childrens Trust udt dated December 1, 1994 fbo Ryan A. Smith, of which the reporting person and Mark D. Balk are trustees; and (3) a gift of 350 to Robert A. Smith and Dana Weiss 1994 Childrens Trust udt dated December 1, 1994 fbo Madeleine W. Smith, of which the reporting person and Mark D. Balk are trustees.</footnote>
        <footnote id="F2">Reflects the shares held directly and indirectly by the following persons or entities and indirectly by Dana A Weiss   175,463 shares owned directly by Robert A Smith, husband of the reporting person: 39,091 shares owned indirectly by Robert A Smith 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 by Robert A Smith 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 as a trustee of the Robert A Smith and Dana Weiss 1994 Childrens Trust udt dated December 1, 1994 fbo Madeleine W Smith, 4,741 shares owned indirectly as a trustee of the Robert A Smith and Dana Weiss 1994 Childrens Trust udt dated December 1, 1994 fbo Ryan A. Smith, 4,741 shares owned indirectly as a trustee of the Robert A Smith and Dana Weiss 1994 Childrens Trust udt dated December 1, 1994 fbo Jackson A Smith, 52,360 shares owned indirectly by Robert A Smith and the reporting person as trustees of the Robert A Smith Grantor Retained Annuity Trust, 16,069 shares owned indirectly as a trustee of the Robert A Smith 1998 Grantor Retained Annuity Trust fbo Jackson A Smith, 16,070 shares owned indirectly as a trustee of the Robert A Smith 1998 Grantor Retained Annuity Trust fbo Madeleine W Smith, 16,069 shares owned indirectly as a trustee of the Robert A Smith 1998 Grantor Retained Annuity Trust fbo Ryan A Smith,</footnote>
        <footnote id="F4">48,208 shares owned indirectly by Robert A Smith as a trustee for the Robert A Smith 1978 Insurance Trust, 6,686 shares owned indirectly by Richard A Smith and the reporting person as guardians of the property of Madeleine W Smith, 6,686 shares owned indirectly by Richard A Smith and the reporting person as guardians of the property of Ryan A Smith, and 6,686 shares owned indirectly by Richard A Smith and the reporting person as guardians of the property of Jackson A Smith.  The reporting person disclaims beneficial ownership of all 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>

