<SEC-DOCUMENT>0001193125-14-257639-index.html : 20140701
<SEC-HEADER>0001193125-14-257639.hdr.sgml : 20140701
<ACCEPTANCE-DATETIME>20140701155333
ACCESSION NUMBER:		0001193125-14-257639
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		19
CONFORMED PERIOD OF REPORT:	20140430
FILED AS OF DATE:		20140701
DATE AS OF CHANGE:		20140701
EFFECTIVENESS DATE:		20140701

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BlackRock Utility & Infrastructure Trust
		CENTRAL INDEX KEY:			0001528988
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		N-CSRS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-22606
		FILM NUMBER:		14952501

	BUSINESS ADDRESS:	
		STREET 1:		55 EAST 52ND STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10055
		BUSINESS PHONE:		(800) 882-0052

	MAIL ADDRESS:	
		STREET 1:		55 EAST 52ND STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10055
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CSRS
<SEQUENCE>1
<FILENAME>d727978dncsrs.htm
<DESCRIPTION>BLACKROCK UTILITY & INFRASTRUCTURE TRUST
<TEXT>
Document 1 - file: d727978dncsrs.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>d727978dex99cert.htm
<DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 302
<TEXT>
Document 2 - file: d727978dex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906CERT
<SEQUENCE>3
<FILENAME>d727978dex99906cert.htm
<DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 906
<TEXT>
Document 3 - file: d727978dex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.12(C)
<SEQUENCE>4
<FILENAME>d727978dex9912c.htm
<DESCRIPTION>SECTION 19(A) NOTICES
<TEXT>
Document 4 - file: d727978dex9912c.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g727915ds_4.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g727915ds_4.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g727915dsp17.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g727915dsp17.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g727915dsp19.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g727915dsp19.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g727915dsp25.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: g727915dsp25.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>g727915dsp27.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: g727915dsp27.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>g727915dsp7n.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: g727915dsp7n.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>g727915dsp9.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 11 - file: g727915dsp9.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>g727915dsp_15.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: g727915dsp_15.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>g727915dsp_4.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 13 - file: g727915dsp_4.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>g727915g90d13.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 14 - file: g727915g90d13.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>g727915new1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 15 - file: g727915new1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>16
<FILENAME>g727915new2.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 16 - file: g727915new2.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>17
<FILENAME>g727915snap1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 17 - file: g727915snap1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>18
<FILENAME>g727915snap5.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 18 - file: g727915snap5.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>19
<FILENAME>g727915snapabc.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 19 - file: g727915snapabc.jpg

</DOCUMENT>
</SEC-DOCUMENT>