-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Eq84ofKRcGBB8MErbQXD4MDuMuTQ4pz3qvJNxATWX0fTGr9u06NwoNHLomAsUFFS
 0dJQCQjJ/Jlbjn90uWgKAQ==

<SEC-DOCUMENT>0001262014-03-000022.txt : 20031217
<SEC-HEADER>0001262014-03-000022.hdr.sgml : 20031217
<ACCEPTANCE-DATETIME>20031217110218
ACCESSION NUMBER:		0001262014-03-000022
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031215
FILED AS OF DATE:		20031217

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			JACKSON GUY C
		CENTRAL INDEX KEY:			0001248950

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-28414
		FILM NUMBER:		031058981

	BUSINESS ADDRESS:	
		STREET 1:		100 CYBERONICS BLVD.
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77058

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UROLOGIX INC
		CENTRAL INDEX KEY:			0000882873
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS [3845]
		IRS NUMBER:				411697237
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		14405 21ST AVE N
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55447
		BUSINESS PHONE:		6124751400

	MAIL ADDRESS:	
		STREET 1:		14405 21ST AVENUE NORTH
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55447
</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>2003-12-15</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000882873</issuerCik>
        <issuerName>UROLOGIX INC</issuerName>
        <issuerTradingSymbol>ULGX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001248950</rptOwnerCik>
            <rptOwnerName>JACKSON GUY C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1></rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity></rptOwnerCity>
            <rptOwnerState></rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>

        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>6.4</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2003-12-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2004-06-15</value>
            </exerciseDate>
            <expirationDate>
                <value>2013-12-15</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>10000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>

    </derivativeTable>



    <ownerSignature>
        <signatureName>By April Hamlin, Attorney-In-Fact for Guy C. Jackson</signatureName>
        <signatureDate>2003-12-17</signatureDate>
    </ownerSignature>

</ownershipDocument>

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