<SEC-DOCUMENT>0001104659-17-071866-index.html : 20171205
<SEC-HEADER>0001104659-17-071866.hdr.sgml : 20171205
<ACCEPTANCE-DATETIME>20171205125440
ACCESSION NUMBER:		0001104659-17-071866
CONFORMED SUBMISSION TYPE:	N-CSR
PUBLIC DOCUMENT COUNT:		19
CONFORMED PERIOD OF REPORT:	20170930
FILED AS OF DATE:		20171205
DATE AS OF CHANGE:		20171205
EFFECTIVENESS DATE:		20171205

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-CSR
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-06565
		FILM NUMBER:		171239168

	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
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<TYPE>N-CSR
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<FILENAME>a17-24477_1ncsr.htm
<DESCRIPTION>CERTIFIED ANNUAL SHAREHOLDER REPORT
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Document 1 - file: a17-24477_1ncsr.htm

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<TYPE>EX-99.CODEETH
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<FILENAME>a17-24477_1ex99dcert.htm
<DESCRIPTION>EX-99.CERT
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Document 3 - file: a17-24477_1ex99dcert.htm

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Document 6 - file: j17244772_ba018.jpg

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Document 7 - file: j17244772_ba019.jpg

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Document 10 - file: j17244772_ba022.jpg

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Document 13 - file: j17244772_ba025.jpg

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Document 14 - file: j17244772_ba026.jpg

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Document 17 - file: j17244772_aa015.jpg

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Document 18 - file: j17244772_aa016.jpg

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Document 19 - file: j17244772_aa017.jpg

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