SECURITIES AND EXCHANGE COMMISSION
                                WASHINGTON, D.C.

                                    FORM 8-A


                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                     PURSUANT TO SECTION 12(b) OR (g) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


                     FIRST TRUST/FIDAC MORTGAGE INCOME FUND
             ------------------------------------------------------
             (Exact name of registrant as specified in its charter)


              MASSACHUSETTS                              35-6758396
----------------------------------------    ------------------------------------
(State of Incorporation or Organization)    (I.R.S. Employer Identification No.)


 1001 Warrenville Road, Suite 300, Lisle, Illinois             60532
 -------------------------------------------------           ----------
     (Address of Principal Executive Offices)                (Zip Code)


If this form relates to the registration of a class of securities pursuant to
Section 12(b) of the Exchange Act and is effective pursuant to General
Instruction A. (c), check the following box.--
[X]


If this form relates to the registration of a class of securities pursuant to
Section 12(g) of the Exchange Act and is effective pursuant to General
Instruction A. (d), check the following box.--
[ ]


Securities Act registration statement file number to which this
form relates:  333-123262.

Securities to be registered pursuant to Section 12(b) of the Act:

         TITLE OF EACH CLASS                    NAME OF EACH EXCHANGE ON WHICH
         TO BE SO REGISTERED                    EACH CLASS IS TO BE REGISTERED

Common Shares of Beneficial Interest             New York Stock Exchange, Inc.
      $.01 par value per share


Securities to be registered pursuant to Section 12(g) of the Act:

                                      NONE
                           --------------------------
                                (Title of Class)











                 INFORMATION REQUIRED IN REGISTRATION STATEMENT

ITEM 1.           DESCRIPTION OF REGISTRANT'S SECURITIES TO BE REGISTERED

         The securities to be registered hereunder are common shares of
beneficial interest, $.01 par value per share (the "Shares"), of First
Trust/FIDAC Mortgage Income Fund (the "Registrant"). An application for listing
of the Shares has been filed with the New York Stock Exchange, Inc. A
description of the Shares is contained under the caption "Description of
Shares," at page 32 of the Preliminary Prospectus, which is a part of the
initial Registration Statement on Form N-2 (Registration Nos. 333-123262 and
811-21727), filed with the Securities and Exchange Commission on March 11, 2005.
Such description is incorporated by reference herein.


ITEM 2.           EXHIBITS

         Pursuant to the "Instruction as to Exhibits" of Form 8-A, no exhibits
are filed herewith or incorporated by reference.










                                    SIGNATURE

         Pursuant to the requirements of Section 12 of the Securities Exchange
Act of 1934, the Registrant has duly caused this registration statement to be
signed on its behalf by the undersigned, thereto duly authorized.

                                        FIRST TRUST/FIDAC MORTGAGE INCOME FUND



                                        By: /s/ W. Scott Jardine 
                                            ---------------------------------
                                            W. Scott Jardine, Secretary

April 25, 2005