<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>5</documentType>

    <periodOfReport>2003-12-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <form3HoldingsReported>0</form3HoldingsReported>

    <form4TransactionsReported>1</form4TransactionsReported>

    <issuer>
        <issuerCik>0001051717</issuerCik>
        <issuerName>AMERUS GROUP CO/IA</issuerName>
        <issuerTradingSymbol>AMH</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001069771</rptOwnerCik>
            <rptOwnerName>GODLASKY THOMAS C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>699 WALNUT STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 2000</rptOwnerStreet2>
            <rptOwnerCity>DES MOINES</rptOwnerCity>
            <rptOwnerState>IA</rptOwnerState>
            <rptOwnerZipCode>50309</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and COO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Performance Rights</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>39.0800</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2002-02-15</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2002-02-15</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value>L</value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>31.0000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>31.0000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>31.0000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Additional performance rights acquired through the Company's Senior Executive Incentive Plan on units purchased using a portion of their annual bonus in February 1999.  The plan, an employee plan exempt under Section 16b-3, provides that employees may purchase phantom stock units at a price per unit equal to the fair market value (FMV) of the Company's common stock on the date of the bonus payment.  The company will match a specified percentage of the phantom stock units purchased pursuant to the deferral program.  At redeferral, employees who did not meet the Company match maximum of $20,000 in 1999, received addtional units based on the FMV of the Company's common stock on the redeferrel date  (2/15/2002).</footnote>
        <footnote id="F2">On the third anniversary of the employee's deferral, the Company either will pay to the employee an amount in cash determined by multiplying the number of units times the FMV of the Company's common stock on that date or issue the underlying common stock.  Alternatively, on the third anniversary of the employee's deferral, the employee may elect to redefer the bonus units for another three year period and every three years thereafter, until the earlier of normal retirement or termination.  The entire Company match is forfeited if the employee's employment terminates prior to the third anniversary of the employee's deferral.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jeananne M. Celander, attorney-in-fact for Mr. Godlasky</signatureName>
        <signatureDate>2004-02-17</signatureDate>
    </ownerSignature>
</ownershipDocument>

