<SEC-DOCUMENT>0000891804-18-000503-index.html : 20181206
<SEC-HEADER>0000891804-18-000503.hdr.sgml : 20181206
<ACCEPTANCE-DATETIME>20181206090729
ACCESSION NUMBER:		0000891804-18-000503
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		10
CONFORMED PERIOD OF REPORT:	20180930
FILED AS OF DATE:		20181206
DATE AS OF CHANGE:		20181206
EFFECTIVENESS DATE:		20181206

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NUVEEN SELECT MATURITIES MUNICIPAL FUND
		CENTRAL INDEX KEY:			0000890119
		IRS NUMBER:				363837799
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0531

	FILING VALUES:
		FORM TYPE:		N-CSRS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-07056
		FILM NUMBER:		181219155

	BUSINESS ADDRESS:	
		STREET 1:		333 WEST WACKER DRIVE
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
		BUSINESS PHONE:		3129177200

	MAIL ADDRESS:	
		STREET 1:		333 W WACKER DRIVE
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NUVEEN INTERMEDIATE OPPORTUNITY MUNICIPAL FUND
		DATE OF NAME CHANGE:	19600201
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CSRS
<SEQUENCE>1
<FILENAME>ncsr.htm
<DESCRIPTION>NIM
<TEXT>
Document 1 - file: ncsr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>ex99cert.htm
<DESCRIPTION>CERTIFICATIONS
<TEXT>
Document 2 - file: ex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906 CERT
<SEQUENCE>3
<FILENAME>ex99906cert.htm
<DESCRIPTION>CERTIFICATION
<TEXT>
Document 3 - file: ex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>nim-13clnx1x1.jpg
<TEXT>
Document 4 - file: nim-13clnx1x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>nim-13clnx2x1.jpg
<TEXT>
Document 5 - file: nim-13clnx2x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>nim-13clnx4x1.jpg
<TEXT>
Document 6 - file: nim-13clnx4x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>nim-13clnx4x2.jpg
<TEXT>
Document 7 - file: nim-13clnx4x2.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>nim-13clnx11x1.jpg
<TEXT>
Document 8 - file: nim-13clnx11x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>nim-13clnx56x1.jpg
<TEXT>
Document 9 - file: nim-13clnx56x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>nim-13clnx56x2.jpg
<TEXT>
Document 10 - file: nim-13clnx56x2.jpg

</DOCUMENT>
</SEC-DOCUMENT>