<SEC-DOCUMENT>0001104659-15-042821-index.html : 20150602
<SEC-HEADER>0001104659-15-042821.hdr.sgml : 20150602
<ACCEPTANCE-DATETIME>20150602134948
ACCESSION NUMBER:		0001104659-15-042821
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		9
CONFORMED PERIOD OF REPORT:	20150331
FILED AS OF DATE:		20150602
DATE AS OF CHANGE:		20150602
EFFECTIVENESS DATE:		20150602

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TEKLA LIFE SCIENCES INVESTORS
		CENTRAL INDEX KEY:			0000884121
		IRS NUMBER:				043147016
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		N-CSRS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-06565
		FILM NUMBER:		15906290

	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>
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<TYPE>N-CSRS
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<FILENAME>a15-10321_2ncsrs.htm
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Document 1 - file: a15-10321_2ncsrs.htm

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Document 2 - file: a15-10321_2ex99dcert.htm

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<DOCUMENT>
<TYPE>EX-99.906CERT
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<FILENAME>a15-10321_2ex99d906cert.htm
<DESCRIPTION>EX-99.906CERT
<TEXT>
Document 3 - file: a15-10321_2ex99d906cert.htm

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Document 4 - file: j15103211_aa004.jpg

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Document 5 - file: j15103211_aa005.jpg

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Document 6 - file: j15103211_aa006.jpg

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<SEQUENCE>7
<FILENAME>j15103211_ba007.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: j15103211_ba007.jpg

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<SEQUENCE>8
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<TEXT>
Document 8 - file: j15103211_ba008.jpg

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Document 9 - file: j15103211_ba009.jpg

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