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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001225208-10-003914.txt : 20100210
<SEC-HEADER>0001225208-10-003914.hdr.sgml : 20100210
<ACCEPTANCE-DATETIME>20100210172405
ACCESSION NUMBER:		0001225208-10-003914
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100209
FILED AS OF DATE:		20100210
DATE AS OF CHANGE:		20100210

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNITED TECHNOLOGIES CORP /DE/
		CENTRAL INDEX KEY:			0000101829
		STANDARD INDUSTRIAL CLASSIFICATION:	AIRCRAFT ENGINES & ENGINE PARTS [3724]
		IRS NUMBER:				060570975
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		UNITED TECHNOLOGIES BLDG
		STREET 2:		ONE FINANCIAL PLZ
		CITY:			HARTFORD
		STATE:			CT
		ZIP:			06101
		BUSINESS PHONE:		8607287000

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	UNITED TECHNOLOGIES MICROELECTRONICS CENTER
		DATE OF NAME CHANGE:	19850825

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	UNITED TECHNOLOGIES CORP
		DATE OF NAME CHANGE:	19841205

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Brown William M
		CENTRAL INDEX KEY:			0001350633

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-00812
		FILM NUMBER:		10588690

	MAIL ADDRESS:	
		STREET 1:		UNITED TECHNOLOGIES CORPORATION
		STREET 2:		ONE FINANCIAL PLAZA
		CITY:			HARTFORD
		STATE:			CT
		ZIP:			06101
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-02-09</periodOfReport>

    <issuer>
        <issuerCik>0000101829</issuerCik>
        <issuerName>UNITED TECHNOLOGIES CORP /DE/</issuerName>
        <issuerTradingSymbol>UTX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001350633</rptOwnerCik>
            <rptOwnerName>Brown William M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE FINANCIAL PLAZA</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HARTFORD</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06101</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>President, UTC Fire &amp; Security</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-02-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>12600</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>65.4</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>22788</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-02-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>4163</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>65.4</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>18625</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4013.128</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Savings Plan Trustee</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The acquisition of shares of UTC common stock represents the vesting of performance share units (PSUs) previously awarded on January 3, 2007 to the reporting person under the UTC 2005 Long Term Incentive Plan.  Each PSU has a value equal to one share of UTC common stock. The PSUs vested solely upon achievement of pre-established performance targets for UTC's earnings per share and total shareholder return over a three year
performance period.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Charles F. Hildebrand as Attorney-in-Fact</signatureName>
        <signatureDate>2010-02-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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