<SEC-DOCUMENT>0001104659-20-132297-index.html : 20201204
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<ACCEPTANCE-DATETIME>20201204121630
ACCESSION NUMBER:		0001104659-20-132297
CONFORMED SUBMISSION TYPE:	N-CSR
PUBLIC DOCUMENT COUNT:		16
CONFORMED PERIOD OF REPORT:	20200930
FILED AS OF DATE:		20201204
DATE AS OF CHANGE:		20201204
EFFECTIVENESS DATE:		20201204

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:		201369298

	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
<SEQUENCE>1
<FILENAME>tm2030671d1_ncsr.htm
<DESCRIPTION>N-CSR
<TEXT>
Document 1 - file: tm2030671d1_ncsr.htm

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<DOCUMENT>
<TYPE>EX-99.CODEETH
<SEQUENCE>2
<FILENAME>tm2030671d1_ex99codeeth.htm
<DESCRIPTION>EXHIBIT 99.CODEETH
<TEXT>
Document 2 - file: tm2030671d1_ex99codeeth.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>3
<FILENAME>tm2030671d1_ex99cert.htm
<DESCRIPTION>EXHIBIT 99.CERT
<TEXT>
Document 3 - file: tm2030671d1_ex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.SECTION 19(A)
<SEQUENCE>4
<FILENAME>tm2030671d1_ex99section19a.htm
<DESCRIPTION>EXHIBIT 99.SECTION19(A)
<TEXT>
Document 4 - file: tm2030671d1_ex99section19a.htm

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<DOCUMENT>
<TYPE>EX-99.906CERT
<SEQUENCE>5
<FILENAME>tm2030671d1_ex99-906cert.htm
<DESCRIPTION>EXHIBIT 99.906 CERT
<TEXT>
Document 5 - file: tm2030671d1_ex99-906cert.htm

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<FILENAME>j20306712_aa001.jpg
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Document 6 - file: j20306712_aa001.jpg

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Document 7 - file: j20306712_aa002.jpg

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Document 8 - file: j20306712_aa003.jpg

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Document 9 - file: j20306712_ba004.jpg

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Document 10 - file: j20306712_ba005.jpg

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Document 11 - file: j20306712_ba006.jpg

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Document 12 - file: j20306712_ba007.jpg

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<TYPE>GRAPHIC
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<FILENAME>j20306712_ba008.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 13 - file: j20306712_ba008.jpg

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<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>j20306712_ba009.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 14 - file: j20306712_ba009.jpg

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<TYPE>GRAPHIC
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Document 15 - file: j20306712_ba010.jpg

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Document 16 - file: j20306712_ba011.jpg

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