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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2020-10-02</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001302028</issuerCik>
        <issuerName>Manitex International, Inc.</issuerName>
        <issuerTradingSymbol>MNTX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001732575</rptOwnerCik>
            <rptOwnerName>Jung Sherman</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MANITEX INTERNATIONAL, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>9735 INDUSTRIAL DRIVE</rptOwnerStreet2>
            <rptOwnerCity>BRIDGEVIEW</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60455</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP/Interim PFO/Interim PAO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9861</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Includes 1,650 shares that will vest on March 6, 2021, 1,650 shares that will vest on March 13, 2020, 1,650 shares that will vest on March 6, 2022, 1,700 shares that will vest on March 13, 2022 and 1,700 shares that will vest on March 6, 2023.</footnote>
    </footnotes>

    <remarks>EXHIBIT LIST - Exhibit 24 - Power of Attorney for Sherman Jung</remarks>

    <ownerSignature>
        <signatureName>/s/ Sherman Jung</signatureName>
        <signatureDate>2020-10-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
