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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0000927089-05-000266.txt : 20050620
<SEC-HEADER>0000927089-05-000266.hdr.sgml : 20050617
<ACCEPTANCE-DATETIME>20050620172045
ACCESSION NUMBER:		0000927089-05-000266
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050617
FILED AS OF DATE:		20050620
DATE AS OF CHANGE:		20050620

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MB FINANCIAL INC     /MD
		CENTRAL INDEX KEY:			0001139812
		STANDARD INDUSTRIAL CLASSIFICATION:	SAVINGS INSTITUTION, FEDERALLY CHARTERED [6035]
		IRS NUMBER:				363132116
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		801 WEST MADISON STREET
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60607
		BUSINESS PHONE:		3124217600

	MAIL ADDRESS:	
		STREET 1:		1200 NORTH ASHLAND AVENUE
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60622

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MB FINANCIAL INC/IL
		DATE OF NAME CHANGE:	20011113

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MB MIDCITY INC
		DATE OF NAME CHANGE:	20010502

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FITZGIBBON THOMAS P
		CENTRAL INDEX KEY:			0001244442

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-24566-01
		FILM NUMBER:		05906510

	BUSINESS ADDRESS:	
		STREET 1:		C/O MB FINANCIAL, INC.
		STREET 2:		801 WEST MADISON STREET
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60607
		BUSINESS PHONE:		7736457868

	MAIL ADDRESS:	
		STREET 1:		C/O MB FINANCIAL, INC.
		STREET 2:		1200 NORTH ASHLAND AVENUE
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60622
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-06-17</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001139812</issuerCik>
        <issuerName>MB FINANCIAL INC     /MD</issuerName>
        <issuerTradingSymbol>MBFI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001244442</rptOwnerCik>
            <rptOwnerName>FITZGIBBON THOMAS P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MB FINANCIAL, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>6111 NORTH RIVER ROAD</rptOwnerStreet2>
            <rptOwnerCity>ROSEMONT</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60018</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Exec. Officer of Subsidiary</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-06-17</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>12</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>39.78</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2042</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Deferred Comp Plan</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>34004</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5449</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By 401(k)</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>405</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By 401(k) Rollover</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>16.8933</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2005-07-31</value>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <value>2011-07-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>9375</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9375</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>21.2066</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2006-07-18</value>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <value>2012-07-18</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>11100</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11100</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>26.8933</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2007-07-23</value>
                <footnoteId id="F6"/>
            </exerciseDate>
            <expirationDate>
                <value>2013-07-23</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>9900</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9900</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>37.06</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2008-08-24</value>
                <footnoteId id="F7"/>
            </exerciseDate>
            <expirationDate>
                <value>2014-08-24</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>8858</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8858</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Transaction represents the acquisition of units in Issuer's common stock fund pursuant to Issuer's Deferred Compensation Plan.  Number of shares shown as acquired on transaction date and as beneficially owned under the plan following the reported transaction represents the approximate equivalent number of shares of the Issuer's common stock.</footnote>
        <footnote id="F2">Not included in this form are shares held by trusts of which Mr. FitzGibbon is the trustee and shares as to which Mr. FitzGibbon has been granted a power of attorney in which Mr FitzGibbon does not have a pecuniary interest.</footnote>
        <footnote id="F3">Reflects reporting person's holdings of units in Issuer's common stock fund under Issuer's 401(k) plan.  Number of shares shown as beneficially owned under the plan represents the approximate equivalent number of shares of Issuer's common stock.</footnote>
        <footnote id="F4">Grant to reporting person of option to purchase shares of common stock under Issuer's 1997 Omnibus Incentive Plan.  This option becomes vested on 07/31/05.</footnote>
        <footnote id="F5">Grant to reporting person of option to purchase shares of common stock under Issuer's 1997 Omnibus Incentive Plan.  This option becomes vested on 07/18/06.</footnote>
        <footnote id="F6">Grant to reporting person of option to purchase shares of common stock under Issuer's 1997 Omnibus Incentive Plan.  This option becomes vested on 07/23/07.</footnote>
        <footnote id="F7">Grant to reporting person of option to purchase shares of common stock under Issuer's 1997 Omnibus Incentive Plan.  This option becomes vested on 08/24/2008.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Thomas P. FitzGibbon</signatureName>
        <signatureDate>2005-06-20</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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