UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 10-K/A
(Amendment No. 1)

(Mark One)

| | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF
1934 for the fiscal year ended September 30, 2004
| | ---------------------------------------------------------------------------------------------------------------------------------

| | OR
| | --

| | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT
OF 1934 for the transition period from ___________ to _____________.
| | -----------------------------------------------------------------------------------------------------------------------------------------------------

Commission File Number 000-23357
BIOANALYTICAL SYSTEMS, INC.
(Exact name of the registrant as specified in its charter)

|INDIANA
(State or other jurisdiction of
incorporation or organization)
2701 KENT AVENUE
WEST LAFAYETTE, INDIANA
(Address of principal executive offices) | 35-1345024
(I.R.S. Employer
Identification No.)

47906
(Zip code)
|-------------------------------------------------------------------------------------------------------------------------------------------------------- | -----------------------------------------------------------------

|(765) 463-4527
(Registrant's telephone number, including area code)
|-------------------------------------------------------------------

Securities registered pursuant to Section 12(b) of the Act:  None

Securities registered pursuant to section 12(g) of the Act:  Common
Shares

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.    YES 
    NO

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K.

Indicate by check mark whether the registrant is an accelerated filer (as
defined in Rule 12b-2).    YES     NO

Based on the closing price on the NASDAQ stock market on January 10, 2005, the
aggregate market value of the voting and non-voting common equity held by
non-affiliates of the registrant is $18,297,510. As of January 10, 2005,
4,869,502 shares of registrant's common shares were outstanding. No shares of
registrant's Preferred Stock were outstanding as of January 10, 2004.

EXPLANATORY NOTE

The Company is filing this Amendment No. 1 to Annual Report on Form 10-K/A which
was for the fiscal year ended September 30, 2004, solely to correct a
typographical error in the Section 1350 Certifications contained in Exhibit 32.
Except for the item noted above, no other information is being amended by this
Form 10-K/A. The Company has not updated disclosures in this Form 10-K/A to
reflect any event subsequent to the Companys filing of the original Form
10-K.

# SIGNATURES

Pursuant to
the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

|Date:  January 25, 2005 | BIOANALYTICAL SYSTEMS, INC.
(Registrant)

By:  /s/ Peter T. Kissinger
Peter T. Kissinger
President, Chairman and Chief Executive
Officer


By:  /s/ Michael R. Cox
Michael R. Cox
Vice President, Finance, Chief Financial
Officer and Treasurer
|----------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Pursuant to the requirements of the Securities Exchange Act of 1934, this report
has been signed below by the following persons on behalf of the Registrant and
in the capacities and on the dates indicated.

|Signature | Capacity | Date
|--------- | -------- | ----

|/s/  Peter T. Kissinger
Peter T. Kissinger | President, Chairman and Chief
Executive Officer and Director
(Principal Executive Officer) | January 25, 2005
|------------------------------------------ | ------------------------------------------------------------------------------------------ | ----------------

|/s/  Michael R. Cox
Michael R. Cox | Vice President, Finance, Chief Financial
Officer and Treasurer
(Principal Financial and Accounting Officer) | January 25, 2005
|---------------------------------- | ----------------------------------------------------------------------------------------------------------- | ----------------

|/s/  William E. Baitinger
William E. Baitinger | Director | January 25, 2005
|---------------------------------------------- | -------- | ----------------

|/s/  David W. Crabb
David W. Crabb | Director | January 25, 2005
|---------------------------------- | -------- | ----------------

|Gayl W. Doster | Director | January __, 2005
|-------------- | -------- | ----------------

|/s/  Candice B. Kissinger
Candice B. Kissinger | Director | January 25, 2005
|---------------------------------------------- | -------- | ----------------

|/s/  Ronald E. Shoup
Ronald E. Shoup | Director | January 25, 2005
|------------------------------------ | -------- | ----------------

|Leslie B. Daniels | Director | January __, 2005
|----------------- | -------- | ----------------

|W. Leigh Thompson | Director | January __, 2005
|----------------- | -------- | ----------------