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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 KaPLiUAcjVZbvR6kPs5rTKbhu6cAzIlPRwThSNC/yB/cSDRIod9r6z3Lded4XwPi
 9L+BT/PnbNN1CMMztS3lDA==

<SEC-DOCUMENT>0000916396-05-000025.txt : 20050518
<SEC-HEADER>0000916396-05-000025.hdr.sgml : 20050518
<ACCEPTANCE-DATETIME>20050518102405
ACCESSION NUMBER:		0000916396-05-000025
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050517
FILED AS OF DATE:		20050518
DATE AS OF CHANGE:		20050518

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MFB CORP
		CENTRAL INDEX KEY:			0000916396
		STANDARD INDUSTRIAL CLASSIFICATION:	SAVINGS INSTITUTION, FEDERALLY CHARTERED [6035]
		IRS NUMBER:				351907258
		STATE OF INCORPORATION:			IN
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		121 SOUTH CHURCH ST
		CITY:			MISHAWAKA
		STATE:			IN
		ZIP:			46544
		BUSINESS PHONE:		5742553146

	MAIL ADDRESS:	
		STREET 1:		121 SOUTH CHURCH ST
		CITY:			MISHAWNA
		STATE:			IN
		ZIP:			46544

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VIATER CHARLES J
		CENTRAL INDEX KEY:			0001247017

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12279
		FILM NUMBER:		05840380

	MAIL ADDRESS:	
		STREET 1:		121 S CHURCH ST
		CITY:			MISHAWAKA
		STATE:			IN
		ZIP:			46544
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4051705_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-05-17</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000916396</issuerCik>
        <issuerName>MFB CORP</issuerName>
        <issuerTradingSymbol>MFBC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001247017</rptOwnerCik>
            <rptOwnerName>VIATER CHARLES J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>121 S CHURCH ST</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MISHAWAKA</rptOwnerCity>
            <rptOwnerState>IN</rptOwnerState>
            <rptOwnerZipCode>46544</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President, CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock w/o Par Value</value>
            </securityTitle>
            <transactionDate>
                <value>2005-05-17</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>68.665</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>28.62</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>44746.522</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <remarks>Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>Charles B Ball</signatureName>
        <signatureDate>2005-05-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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