<SEC-DOCUMENT>0001728564-18-000002.txt : 20180118
<SEC-HEADER>0001728564-18-000002.hdr.sgml : 20180118
<ACCEPTANCE-DATETIME>20180118153027
ACCESSION NUMBER:		0001728564-18-000002
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20171219
FILED AS OF DATE:		20180118
DATE AS OF CHANGE:		20180118

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Kent Thomas M
		CENTRAL INDEX KEY:			0001728564

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-06565
		FILM NUMBER:		18533913

	MAIL ADDRESS:	
		STREET 1:		19 ALBEE DRIVE
		CITY:			BRAINTREE
		STATE:			MA
		ZIP:			02184

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TEKLA LIFE SCIENCES INVESTORS
		CENTRAL INDEX KEY:			0000884121
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				043147016
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		100 FEDERAL STREET
		STREET 2:		19TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
		BUSINESS PHONE:		6177728515

	MAIL ADDRESS:	
		STREET 1:		100 FEDERAL STREET
		STREET 2:		19TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	H&Q LIFE SCIENCES INVESTORS
		DATE OF NAME CHANGE:	19920929
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2017-12-19</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000884121</issuerCik>
        <issuerName>TEKLA LIFE SCIENCES INVESTORS</issuerName>
        <issuerTradingSymbol>HQL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001728564</rptOwnerCik>
            <rptOwnerName>Kent Thomas M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>19 ALBEE DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BRAINTREE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02184</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <ownerSignature>
        <signatureName>Thomas M. Kent</signatureName>
        <signatureDate>2018-01-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
