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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>0001014108-03-000097.txt : 20030731
<SEC-HEADER>0001014108-03-000097.hdr.sgml : 20030731
<ACCEPTANCE-DATETIME>20030731170137
ACCESSION NUMBER:		0001014108-03-000097
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030703
FILED AS OF DATE:		20030731

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			EXCHANGE NATIONAL BANCSHARES INC
		CENTRAL INDEX KEY:			0000893847
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				431626350
		STATE OF INCORPORATION:			MO
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		132 EAST HIGH STREET
		CITY:			JEFFERSON CITY
		STATE:			MO
		ZIP:			65101
		BUSINESS PHONE:		(573)761-6100

	MAIL ADDRESS:	
		STREET 1:		P.O. BOX 688
		CITY:			JEFFERSON CITY
		STATE:			MO
		ZIP:			65102

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WETZEL GUS S II
		CENTRAL INDEX KEY:			0001196008

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-23636
		FILM NUMBER:		03815337

	BUSINESS ADDRESS:	
		STREET 1:		1700 SOUTH 8TH ST.
		CITY:			CLINTON
		STATE:			MO
		ZIP:			64735
		BUSINESS PHONE:		5737616100

	MAIL ADDRESS:	
		STREET 1:		1700 SOUTH 8TH ST.
		CITY:			CLINTON
		STATE:			MO
		ZIP:			64735
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2003-07-03</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000893847</issuerCik>
        <issuerName>EXCHANGE NATIONAL BANCSHARES INC</issuerName>
        <issuerTradingSymbol>EXJF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001196008</rptOwnerCik>
            <rptOwnerName>WETZEL GUS S II</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1700 SOUTH 8TH ST.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CLINTON</rptOwnerCity>
            <rptOwnerState>MO</rptOwnerState>
            <rptOwnerZipCode>64735</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>2003-07-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>9.439</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>52.97</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>62.48</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>

    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Includes (a) 0.164 shares acquired on July 3, 2003 through the automatic reinvestment of dividends under the Issuer's Automatic Dividend Reinvestment Plan, and (b) 20.827 shares acquired on July 15, 2003 as a result of the Issuer's 3-for-2 stock split.</footnote>
    </footnotes>


    <ownerSignature>
        <signatureName>Kathleen L. Bruegenhemke, Attorney-in-Fact</signatureName>
        <signatureDate>2003-07-29</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
