<SEC-DOCUMENT>0001410368-17-001710-index.html : 20171127
<SEC-HEADER>0001410368-17-001710.hdr.sgml : 20171127
<ACCEPTANCE-DATETIME>20171127145632
ACCESSION NUMBER:		0001410368-17-001710
CONFORMED SUBMISSION TYPE:	NSAR-B
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20170930
FILED AS OF DATE:		20171127
DATE AS OF CHANGE:		20171127
EFFECTIVENESS DATE:		20171127

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:		NSAR-B
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-06565
		FILM NUMBER:		171222620

	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>NSAR-B
<SEQUENCE>1
<FILENAME>hqlanswer.fil
<DESCRIPTION>ANSWER FILE
<TEXT>
Document 1 - file: hqlanswer.fil

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77B ACCT LTTR
<SEQUENCE>2
<FILENAME>HQLex77b.txt
<DESCRIPTION>AUDIT LETTER
<TEXT>
Document 2 - file: HQLex77b.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77C VOTES
<SEQUENCE>3
<FILENAME>HQLex77c.txt
<DESCRIPTION>VOTING
<TEXT>
Document 3 - file: HQLex77c.txt

</DOCUMENT>
</SEC-DOCUMENT>