    <SEC-DOCUMENT>0001521951-18-000090-index.html : 20181031
    <SEC-HEADER>0001521951-18-000090.hdr.sgml : 20181031
    <ACCEPTANCE-DATETIME>20181031165313
    ACCESSION NUMBER:		0001521951-18-000090
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		27
    CONFORMED PERIOD OF REPORT:	20181026
    ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
    ITEM INFORMATION:		Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20181031
    DATE AS OF CHANGE:		20181031

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			FIRST BUSINESS FINANCIAL SERVICES, INC.
    		CENTRAL INDEX KEY:			0001521951
    		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
    		IRS NUMBER:				391576570
    		STATE OF INCORPORATION:			WI
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-34095
    		FILM NUMBER:		181150972

    	BUSINESS ADDRESS:
    		STREET 1:		401 CHARMANY DRIVE
    		CITY:			MADISON
    		STATE:			WI
    		ZIP:			53719
    		BUSINESS PHONE:		608-238-8008

    	MAIL ADDRESS:
    		STREET 1:		401 CHARMANY DRIVE
    		STREET 2:		PO BOX 44961
    		CITY:			MADISON
    		STATE:			WI
    		ZIP:			53744

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	First Business Financial Services, Inc.
    		DATE OF NAME CHANGE:	20110527
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>a10262018form8-kbylawsandd.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: a10262018form8-kbylawsandd.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-3.1
    <SEQUENCE>2
    <FILENAME>exhibitform8-kbylawsanddir.htm
    <DESCRIPTION>EXHIBIT 3.1
    <TEXT>
    Document 2 - file: exhibitform8-kbylawsanddir.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>amendedandrestatedbylaws001.jpg
    <TEXT>
    Document 3 - file: amendedandrestatedbylaws001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>amendedandrestatedbylaws002.jpg
    <TEXT>
    Document 4 - file: amendedandrestatedbylaws002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>amendedandrestatedbylaws003.jpg
    <TEXT>
    Document 5 - file: amendedandrestatedbylaws003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>amendedandrestatedbylaws004.jpg
    <TEXT>
    Document 6 - file: amendedandrestatedbylaws004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>amendedandrestatedbylaws005.jpg
    <TEXT>
    Document 7 - file: amendedandrestatedbylaws005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>amendedandrestatedbylaws006.jpg
    <TEXT>
    Document 8 - file: amendedandrestatedbylaws006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>amendedandrestatedbylaws007.jpg
    <TEXT>
    Document 9 - file: amendedandrestatedbylaws007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>amendedandrestatedbylaws008.jpg
    <TEXT>
    Document 10 - file: amendedandrestatedbylaws008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>amendedandrestatedbylaws009.jpg
    <TEXT>
    Document 11 - file: amendedandrestatedbylaws009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>amendedandrestatedbylaws010.jpg
    <TEXT>
    Document 12 - file: amendedandrestatedbylaws010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>amendedandrestatedbylaws011.jpg
    <TEXT>
    Document 13 - file: amendedandrestatedbylaws011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>amendedandrestatedbylaws012.jpg
    <TEXT>
    Document 14 - file: amendedandrestatedbylaws012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>amendedandrestatedbylaws013.jpg
    <TEXT>
    Document 15 - file: amendedandrestatedbylaws013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>amendedandrestatedbylaws014.jpg
    <TEXT>
    Document 16 - file: amendedandrestatedbylaws014.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>amendedandrestatedbylaws015.jpg
    <TEXT>
    Document 17 - file: amendedandrestatedbylaws015.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>amendedandrestatedbylaws016.jpg
    <TEXT>
    Document 18 - file: amendedandrestatedbylaws016.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>amendedandrestatedbylaws017.jpg
    <TEXT>
    Document 19 - file: amendedandrestatedbylaws017.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>amendedandrestatedbylaws018.jpg
    <TEXT>
    Document 20 - file: amendedandrestatedbylaws018.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>amendedandrestatedbylaws019.jpg
    <TEXT>
    Document 21 - file: amendedandrestatedbylaws019.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>amendedandrestatedbylaws020.jpg
    <TEXT>
    Document 22 - file: amendedandrestatedbylaws020.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>amendedandrestatedbylaws021.jpg
    <TEXT>
    Document 23 - file: amendedandrestatedbylaws021.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>amendedandrestatedbylaws022.jpg
    <TEXT>
    Document 24 - file: amendedandrestatedbylaws022.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>amendedandrestatedbylaws023.jpg
    <TEXT>
    Document 25 - file: amendedandrestatedbylaws023.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>amendedandrestatedbylaws024.jpg
    <TEXT>
    Document 26 - file: amendedandrestatedbylaws024.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>amendedandrestatedbylaws025.jpg
    <TEXT>
    Document 27 - file: amendedandrestatedbylaws025.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>