Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0104
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
  Eccher James
 2. Date of Event Requiring Statement (Month/Day/Year)
01/18/2005		 3. Issuer Name and Ticker or Trading Symbol
OLD SECOND BANCORP INC [OSBC]
(Last)
(First)
(Middle)
C/O OLD SECOND NATIONAL BANK, 37 S. RIVER ST.		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Executive Officer
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

AURORA, IL 60506		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Old Second Bancorp Inc. Common Stock 350 (1)
D
 
Old Second Bancorp Inc. Common Stock 148 (2)
D
 
Old Second Bancorp Inc. Common Stock 64
I
Profit Sharing Plan
Old Second Bancorp Inc. Common Stock 102
I
401(k) Plan

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (Right to buy) 12/21/2005 12/21/2014 Common Stock 12,000 $ 32.59 D  
Employee Stock Option (Right to buy) 12/10/2004 12/16/2013 Common Stock 8,000 $ 25.08 D  
Employee Stock Option (Right to buy) 12/17/2003 12/17/2012 Common Stock 7,000 $ 18.81 D  
Employee Stock Option (Right to buy) 12/18/2002 12/18/2011 Common Stock 6,666 $ 14.74 D  
Employee Stock Option (Right to buy) 12/19/2001 12/19/2010 Common Stock 5,334 $ 8.91 D  
Employee Stock Option (Right to buy) 12/14/2000 12/14/2009 Common Stock 4,800 $ 10.46 D  
Employee Stock Option (Right to buy) 12/08/1999 12/08/2008 Common Stock 4,266 $ 9.75 D  
Employee Stock Option (Right to buy) 12/09/1998 12/09/2007 Common Stock 2,666 $ 11.35 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Eccher James
C/O OLD SECOND NATIONAL BANK
37 S. RIVER ST.
AURORA, IL 60506		       Executive Officer  

Signatures

/s/ James Eccher 01/18/2005
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Of this total, 300 shares are held in nominee name and 50 shares held in Mr. Eccher's name alone.
(2) Shares held jointly with spouse.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.