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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2014-12-03</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001455271</issuerCik>
        <issuerName>Griffin-American Healthcare REIT II, Inc.</issuerName>
        <issuerTradingSymbol>NONE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001397834</rptOwnerCik>
            <rptOwnerName>Johnson Shannon Kathleen S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GRIFFIN-AMERICAN HEALTHCARE REIT II,</rptOwnerStreet1>
            <rptOwnerStreet2>INC., 18191 VON KARMAN AVE., SUITE 300</rptOwnerStreet2>
            <rptOwnerCity>IRVINE</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92612</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Financial Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2014-12-03</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>27638</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Johnson Revocable Trust, DTD 12/27/2006</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Phantom Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2015-01-17</value>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5436</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5436</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Phantom Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2015-09-17</value>
                <footnoteId id="F6"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F7"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10436</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Phantom Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2016-01-17</value>
                <footnoteId id="F8"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F9"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>13436</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Disposition pursuant to the Merger Agreement, dated as of August 5, 2014, by and among NorthStar Realty Finance Corp., NRF Healthcare Subsidiary, LLC, NRF OP Healthcare Subsidiary, LLC, Griffin-American Healthcare REIT II Holdings, LP and Griffin-American Healthcare REIT II, Inc.  Each share of Griffin-American Healthcare REIT II, Inc. common stock, including the 27,638 shares held by the Reporting Person as of the effective time of the merger, was converted into 0.2071 shares of common stock of NorthStar Realty Finance Corp. plus $7.75 in cash.</footnote>
        <footnote id="F2">The reported shares of common stock were held directly by Johnson Revocable Trust, DTD 12/27/2006, and indirectly by Shannon Kathleen S. Johnson and Corwin B. Johnson, Trustees.</footnote>
        <footnote id="F3">Each share of phantom stock is the economic equivalent of one share of common stock of the issuer.</footnote>
        <footnote id="F4">The units of phantom stock will vest fully on 1/17/2015, subject to certain acceleration provisions in accordance with the terms of an American Healthcare Investors LLC Long-Term Incentive Plan Participation Agreement dated 9/17/2013, or Participation Agreement No. I.</footnote>
        <footnote id="F5">There is no expiration date other than forfeiture provisions pursuant to the terms of Participation Agreement No. I.</footnote>
        <footnote id="F6">The units of phantom stock will vest fully on 9/17/2015, subject to certain acceleration provisions in accordance with the terms of an American Healthcare Investors LLC Long-Term Incentive Plan Participation Agreement dated 9/17/2013, or Participation Agreement No. II.</footnote>
        <footnote id="F7">There is no expiration date other than forfeiture provisions pursuant to the terms of Participation Agreement No. II.</footnote>
        <footnote id="F8">The units of phantom stock will vest fully on 1/17/2016, subject to certain acceleration provisions in accordance with the terms of an American Healthcare Investors LLC Long-Term Incentive Plan Participation Agreement dated 1/17/2014, or Participation Agreement No. III.</footnote>
        <footnote id="F9">There is no expiration date other than forfeiture provisions pursuant to the terms of Participation Agreement No. III.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Shannon K S Johnson</signatureName>
        <signatureDate>2014-12-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
