-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 Ec0xwXPtZs+aMVcJ/M10bzV4cw0NM7SGdAk0/4rqH9iuyqHl+1G4qmR52eaKjSaA
 GeI7WCJ7KL6zjRv3MJFTjA==

<SEC-DOCUMENT>0001014108-03-000099.txt : 20030804
<SEC-HEADER>0001014108-03-000099.hdr.sgml : 20030804
<ACCEPTANCE-DATETIME>20030804141302
ACCESSION NUMBER:		0001014108-03-000099
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030731
FILED AS OF DATE:		20030804

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:		03820115

	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>2003-07-31</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>

        <nonDerivativeHolding>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>62.48</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>

        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2003-07-31</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2500</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>42.2</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>60328</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Wetzel Investments LTD</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>

    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Disgorgement of Section 16(b) Short-Swing Profit.  Within six months of the sale of Common Stock disclosed in this report, the Reporting Person purchased a total of 59.2335 shares of Common Stock.  The Reporting Person made these purchases as voluntary additional contributions to the Isser's Automatic Dividend Reinvestment Plan in the mistaken belief that they were exempt under Section 16 of the Securities Exchange Act. The Reporting Person cooperated fully with the Issuer's investigations concerning the Reporting Persons's transactions in the Issuer's securities. At the conclusion of these investigations, the Reporting Person disgorged and paid to the Issuer the entire profit realized by the Reporting Person from any non-exempt purchase and sale, or sale and purchase, of the Issuer's securities within any six month period.  This payment was accepted by the Issuer in settlement of the Reporting Person's Section 16(b) short-swing profit liability.</footnote>
    </footnotes>


    <ownerSignature>
        <signatureName>Gus S. Wetzel</signatureName>
        <signatureDate>2003-08-04</signatureDate>
    </ownerSignature>

</ownershipDocument>

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