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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 BxdYf8dUGGegZh9n+ZBlm4SMs/d60D8E7CrXmtYe/ScT+IAVJ9EBrSiw+Kjrqolc
 3kMDn3kRSuYOO/NOpwrLCQ==

<SEC-DOCUMENT>0001179110-06-024423.txt : 20061229
<SEC-HEADER>0001179110-06-024423.hdr.sgml : 20061229
<ACCEPTANCE-DATETIME>20061229153606
ACCESSION NUMBER:		0001179110-06-024423
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20051231
FILED AS OF DATE:		20061229
DATE AS OF CHANGE:		20061229

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BLANCHARD ERIC A
		CENTRAL INDEX KEY:			0001037494

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-16191
		FILM NUMBER:		061305747

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		847.627.7000

	MAIL ADDRESS:	
		STREET 1:		ONE PARKWAY NORTH BOULEVARD
		CITY:			DEERFIELD
		STATE:			IL
		ZIP:			60015-2559

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TENNANT CO
		CENTRAL INDEX KEY:			0000097134
		STANDARD INDUSTRIAL CLASSIFICATION:	REFRIGERATION & SERVICE INDUSTRY MACHINERY [3580]
		IRS NUMBER:				410572550
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		701 N LILAC DR
		STREET 2:		PO BOX 1452
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55440
		BUSINESS PHONE:		6125401200

	MAIL ADDRESS:	
		STREET 1:		701 N LILAC DR
		STREET 2:		PO BOX 1452
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55440

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TENNANT G H CO
		DATE OF NAME CHANGE:	19700515
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-12-31</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0000097134</issuerCik>
        <issuerName>TENNANT CO</issuerName>
        <issuerTradingSymbol>TNC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001037494</rptOwnerCik>
            <rptOwnerName>BLANCHARD ERIC A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>701 NORTH LILAC DR.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MINNEAPOLIS</rptOwnerCity>
            <rptOwnerState>MN</rptOwnerState>
            <rptOwnerZipCode>55422</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Fmr. VP, New Business</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-12-31</value>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>446</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>26.00</value>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2010</value>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Eric Blanchard is a former Vice President of Tennant Company.</footnote>
        <footnote id="F2">The forfeiture of shares for taxes upon vesting (on December 31, 2005) should have been reported on a Form 4 in January 2006.  All subsequent Form 4s filed by the reporting person after such date should have shown 223 fewer shares (446 after the July 2006 Stock Split) a result of this forfeiture.</footnote>
        <footnote id="F3">This price reflects the July 2006 Stock Split.</footnote>
        <footnote id="F4">This total reflects the July 2006 Stock Split.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/John S. Livingston, as Attorney in Fact</signatureName>
        <signatureDate>2006-12-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.TXT
<SEQUENCE>2
<FILENAME>ex24tncblanchardpoa.txt
<DESCRIPTION>BLANCHARD POWER OF ATTORNEY
<TEXT>
POWER OF ATTORNEY

	I, Eric A. Blanchard, hereby authorize and
designate each of Eric A. Blanchard, Heidi M. Hoard,
John S. Livingston, Amy C. Seidel and Sharon A. Stuckmayer,
signing singly, as my true and lawful attorney-in-fact to:

(1)	execute for and on my behalf, in my capacity as an
officer and/or director of Tennant Company (the "Company"),
Forms 3, 4 and 5 in accordance with Section 16(a) of the
Securities Exchange Act of 1934 (the "Exchange Act") and the
rules and regulations promulgated thereunder;

(2)	do and perform any and all acts for and on my
behalf which may be necessary or desirable to complete and
execute any such Form 3, 4 or 5 and timely file such form
with the Securities and Exchange Commission, any stock
exchange or similar authority, and the National Association
of Securities Dealers; and

(3)	take any other action of any type whatsoever in
connection with the foregoing which, in the opinion of such
attorney-in-fact, may be to my benefit, in my best interest,
or legally required of me, it being understood that the
statements executed by such attorney-in-fact on my behalf
pursuant to this Power of Attorney shall be in such form and
shall contain such terms and conditions as such
attorney-in-fact may approve in such attorney-in-fact's
discretion.

	I hereby further grant to each such attorney-in-fact
full power and authority to do and perform any and every
act and thing whatsoever requisite, necessary, or proper
to be done in the exercise of any of the rights and
powers herein granted, as fully to all intents and purposes
as I might or could do if personally present, with full power
of substitutes or revocation, hereby ratifying and confirming
all that such attorney-in-fact, or such attorney-in-fact's
substitute or substitutes, shall lawfully do or cause to be
done by virtue of this Power of Attorney and the rights and
powers herein granted.  I hereby acknowledge that the
foregoing attorneys-in-fact, in serving in such capacity at
my request, are not assuming, nor is the Company assuming,
any of my responsibilities to comply with Section 16 of the
Exchange Act.

	This Power of Attorney shall remain in full force
and effect until I am no longer required to file Forms 3, 4
and 5 with respect to my holdings of and transactions in
securities issued by the Company, unless earlier revoked by
me in a signed writing delivered to the foregoing
attorneys-in-fact.

	IN WITNESS WHEREOF, I have caused this Power of
Attorney to be duly executed as of this 7th day of May, 2004.


				/s/Eric A. Blanchard


E:\Corporate\Insider Trading\ex24TNCblanchardPOA.txt










</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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