    <SEC-DOCUMENT>0000940394-22-001287-index.html : 20221027
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    <ACCEPTANCE-DATETIME>20220822162846
    ACCESSION NUMBER:		0000940394-22-001287
    CONFORMED SUBMISSION TYPE:	N-2/A
    PUBLIC DOCUMENT COUNT:		22
    FILED AS OF DATE:		20220822
    DATE AS OF CHANGE:		20220822

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			EATON VANCE SENIOR INCOME TRUST
    		CENTRAL INDEX KEY:			0001070732
    		IRS NUMBER:				043435040

    	FILING VALUES:
    		FORM TYPE:		N-2/A
    		SEC ACT:		1940 Act
    		SEC FILE NUMBER:	811-09013
    		FILM NUMBER:		221184051

    	BUSINESS ADDRESS:
    		STREET 1:		TWO INTERNATIONAL PLACE
    		CITY:			BOSTON
    		STATE:			MA
    		ZIP:			02110
    		BUSINESS PHONE:		617-482-8260

    	MAIL ADDRESS:
    		STREET 1:		TWO INTERNATIONAL PLACE
    		CITY:			BOSTON
    		STATE:			MA
    		ZIP:			02110

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			EATON VANCE SENIOR INCOME TRUST
    		CENTRAL INDEX KEY:			0001070732
    		IRS NUMBER:				043435040

    	FILING VALUES:
    		FORM TYPE:		N-2/A
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-263033
    		FILM NUMBER:		221184050

    	BUSINESS ADDRESS:
    		STREET 1:		TWO INTERNATIONAL PLACE
    		CITY:			BOSTON
    		STATE:			MA
    		ZIP:			02110
    		BUSINESS PHONE:		617-482-8260

    	MAIL ADDRESS:
    		STREET 1:		TWO INTERNATIONAL PLACE
    		CITY:			BOSTON
    		STATE:			MA
    		ZIP:			02110
    <IS-FILER-A-NEW-REGISTRANT>N
    <IS-FILER-A-WELL-KNOWN-SEASONED-ISSUER>N
    <FILED-PURSUANT-TO-GENERAL-INSTRUCTION-A2>Y
    <IS-FUND-24F2-ELIGIBLE>N
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>N-2/A
    <SEQUENCE>1
    <FILENAME>evf-20220822.htm
    <DESCRIPTION>AMENDMENT NO. 26
    <TEXT>
    Document 1 - file: evf-20220822.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.(H)(5)
    <SEQUENCE>2
    <FILENAME>exhibith5_ex-99zh5.htm
    <DESCRIPTION>FORM OF DISTRIBUTION AGREEMENT WITH RESPECT TO THE RULE 415 SHELF OFFERING
    <TEXT>
    Document 2 - file: exhibith5_ex-99zh5.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.(H)(6)
    <SEQUENCE>3
    <FILENAME>exhibith6_ex-99zh6.htm
    <DESCRIPTION>FORM OF SUB-PLACEMENT AGENT AGREEMENT
    <TEXT>
    Document 3 - file: exhibith6_ex-99zh6.htm

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    <TYPE>EX-99.(L)
    <SEQUENCE>4
    <FILENAME>exhibitl_ex-99zl.htm
    <DESCRIPTION>OPINION OF INTERNAL COUNSEL
    <TEXT>
    Document 4 - file: exhibitl_ex-99zl.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.(N)
    <SEQUENCE>5
    <FILENAME>exhibitn_ex-99zn.htm
    <DESCRIPTION>CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
    <TEXT>
    Document 5 - file: exhibitn_ex-99zn.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-FILING FEES
    <SEQUENCE>6
    <FILENAME>exhibits_ex-99zs.htm
    <DESCRIPTION>CALCULATION OF FILING FEE TABLE
    <TEXT>
    Document 6 - file: exhibits_ex-99zs.htm

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    <TYPE>EX-99.(T)(2)
    <SEQUENCE>7
    <FILENAME>exhibitt2_ex-99zt2.htm
    <DESCRIPTION>POWER OF ATTORNEY
    <TEXT>
    Document 7 - file: exhibitt2_ex-99zt2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>9
    <FILENAME>evf-20220822.xsd
    <DESCRIPTION>XBRL SCHEMA FILE
    <TEXT>
    Document 9 - file: evf-20220822.xsd

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    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>10
    <FILENAME>evf-20220822_def.xml
    <DESCRIPTION>XBRL DEFINITION FILE
    <TEXT>
    Document 10 - file: evf-20220822_def.xml

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    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>11
    <FILENAME>evf-20220822_lab.xml
    <DESCRIPTION>XBRL LABEL FILE
    <TEXT>
    Document 11 - file: evf-20220822_lab.xml

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    <TYPE>EX-101.PRE
    <SEQUENCE>12
    <FILENAME>evf-20220822_pre.xml
    <DESCRIPTION>XBRL PRESENTATION FILE
    <TEXT>
    Document 12 - file: evf-20220822_pre.xml

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>exhibitlex99zl_1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: exhibitlex99zl_1.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>lettercover_1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: lettercover_1.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>maindocument_1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: maindocument_1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>16
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 16 - file: R1.htm

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>17
    <FILENAME>evf-20220822_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 17 - file: evf-20220822_htm.html

    Document 17 - RAW XML: evf-20220822_htm.xml

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>18
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 18 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>19
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 19 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>20
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 20 - file: FilingSummary.html

    Document 20 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>22
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 22 - file: MetaLinks.json

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    <TYPE>ZIP
    <SEQUENCE>23
    <FILENAME>0000940394-22-001287-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 23 - file: 0000940394-22-001287-xbrl.zip

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