<SEC-DOCUMENT>0001104659-23-095282-index.html : 20230825
<SEC-HEADER>0001104659-23-095282.hdr.sgml : 20230825
<ACCEPTANCE-DATETIME>20230825143542
ACCESSION NUMBER:		0001104659-23-095282
CONFORMED SUBMISSION TYPE:	N-CSR/A
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20220930
FILED AS OF DATE:		20230825
DATE AS OF CHANGE:		20230825
EFFECTIVENESS DATE:		20230825

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/A
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-06565
		FILM NUMBER:		231206976

	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>N-CSR/A
<SEQUENCE>1
<FILENAME>tm2324844-2_ncsra.htm
<DESCRIPTION>N-CSR/A
<TEXT>
Document 1 - file: tm2324844-2_ncsra.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>tm2324844d2_ex99-cert.htm
<DESCRIPTION>EXHIBIT 99 CERT
<TEXT>
Document 2 - file: tm2324844d2_ex99-cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906CERT
<SEQUENCE>3
<FILENAME>tm2324844d2_ex99-906cert.htm
<DESCRIPTION>EXHIBIT 99.906CERT
<TEXT>
Document 3 - file: tm2324844d2_ex99-906cert.htm

</DOCUMENT>
</SEC-DOCUMENT>