1933 ACT FILE NO.:
                                                   1940 ACT FILE NO.:  811-21056
                                                               CIK NO.:  1412337

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C.  20549

                                    FORM S-6

                    FOR REGISTRATION UNDER THE SECURITIES ACT
                    OF 1933 OF SECURITIES OF UNIT INVESTMENT
                        TRUSTS REGISTERED ON FORM N-8B-2

A.  Exact name of trust:       ADVISOR'S DISCIPLINED TRUST 206

B.  Name of depositor:         FIXED INCOME SECURITIES, L.P.

C.  Complete address of depositor's principal executive offices:

                              18925 Base Camp Road
                            Monument, Colorado  80132

D.  Name and complete address of agent for service:

                                                 WITH A COPY TO:

            SCOTT COLYER                         MARK J. KNEEDY
     Fixed Income Securities, L.P.           Chapman and Cutler LLP
         18925 Base Camp Road                111 West Monroe Street
      Monument, Colorado  80132           Chicago, Illinois  60603-4080

E.  Title of securities being registered:  Units of undivided beneficial
    interest in the trust

F.  Approximate date of proposed public offering:

  AS SOON AS PRACTICABLE AFTER THE EFFECTIVE DATE OF THE REGISTRATION STATEMENT

[ ] Check box if it is proposed that this filing will become effective
    on _______, 2007 at _____ pursuant to Rule 487.

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The registrant hereby amends this Registration Statement on such date or dates
as may be necessary to delay its effective date until the registrant shall file
a further amendment which specifically states that this Registration Statement
shall thereafter become effective in accordance with Section 8(a) of the
Securities Act of 1933 or until the Registration Statement shall become
effective on such date as the Commission, acting pursuant to said Section 8(a)
may determine.




                 Preliminary Prospectus Dated November 19, 2007

                         ADVISOR'S DISCIPLINED TRUST 206

                    HIGH-YIELD CLOSED-END PORTFOLIO, SERIES 9


     The attached final Prospectus for a prior series of the fund is hereby used
as a preliminary Prospectus for the above stated series.  The narrative
information and structure of the attached final Prospectus will be substantially
the same as that of the final Prospectus for this series.  Information with
respect to pricing, the number of units, dates and summary information regarding
the characteristics of securities to be deposited in this series is not now
available and will be different since each series has a unique Portfolio.
Accordingly the information contained herein with regard to the previous series
should be considered as being included for informational purposes only.

     A registration statement relating to the units of this series will be filed
with the Securities and Exchange Commission but has not yet become effective.
Information contained herein is subject to completion or amendment.  Such units
may not be sold nor may an offer to buy be accepted prior to the time the
registration statement becomes effective.  This Prospectus shall not constitute
an offer to sell or the solicitation of an offer to buy nor shall there be any
sale of the units in any state in which such offer, solicitation or sale would
be unlawful prior to registration or qualification under the securities laws of
any such state.

(Incorporated herein by reference is the final prospectus from Advisor's
Disciplined Trust 171 (Registration No. 333-144918) as filed on August 1, 2007,
which shall be used as a preliminary prospectus for the current series of the
fund.)









                       CONTENTS OF REGISTRATION STATEMENT

     This Amendment to the Registration Statement comprises the following papers
and documents:
     The facing sheet
     The prospectus
     The signatures
     The consents of the initial evaluator, independent public accountants and
     legal counsel

The following exhibits:

1.1    Trust Agreement (to be filed by amendment).

1.1.1  Standard Terms and Conditions of Trust (to be filed by amendment).

1.2    Certificate of Limited Partnership of Fixed Income Securities, L.P.
       Reference is made to Exhibit A(6)(a) to the Registration Statement on
       Form N-8B-2 for Advisor's Disciplined Trust (File No. 811-21056) as
       filed on March 22, 2006.

1.3    Agreement of Limited Partnership of Fixed Income Securities, L.P.
       Reference is made to Exhibit A(6)(b) to the Registration Statement on
       Form N-8B-2 for Advisor's Disciplined Trust (File No. 811-21056) as
       filed on March 22, 2006.

1.4    Articles of Organization of Sterling Management, LLC, general partner of
       Fixed Income Securities, L.P.  Reference is made to Exhibit 1.4 to the
       Registration Statement on Form S-6 for Advisor's Disciplined Trust 73
       (File No. 333-131959) as filed on March 16, 2006.

1.5    Operating Agreement of Sterling Management, LLC, general partner of Fixed
       Income Securities L.P. Referenced is made Exhibit 1.5 to the Registration
       Statement on Form S-6 for Advisor's Disciplined Trust 73
       (File No. 333-131959) as filed on March 16, 2006.

2.1    Copy of Certificate of Ownership (included in Exhibit 1.1.1 filed
       herewith and incorporated herein by reference).

2.2    Form of Code of Ethics.  Reference is made to Exhibit 2.2 to the
       Registration Statement on Form S-6 for Advisor's Disciplined Trust 73
       (File No. 333-131959) as filed on March 16, 2006.

3.1    Opinion of counsel as to legality of securities being registered (to be
       filed by amendment).

3.2    Opinion of counsel as to the New York and federal income tax status of
       securities being registered (to be filed by amendment).

3.3    Opinion of counsel as to the Trustee and the Trust. (to be filed by
       amendment).

4.1    Consent of evaluator (to be filed by amendment).

4.2    Consent of independent auditors (to be filed by amendment).

6.1    List of Officers of Fixed Income Securities, L.P.  Reference is made to
       Exhibit 6.1 to the Registration Statement on Form S-6 for Advisor's
       Disciplined Trust, Series 10 (File No. 333-115977) as filed on
       May 28, 2004.

7.1    Power of Attorney.  Reference is made to Exhibit 7.1 to the Registration
       Statement on Form S-6 for Advisor's Disciplined Trust, Series 10
       (File No. 333-115977) as filed on May 28, 2004.


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                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the Registrant,
Advisor's Disciplined Trust 206 has duly caused this Registration Statement to
be signed on its behalf by the undersigned, thereunto duly authorized, in the
City of Wichita and State of Kansas on the 19th day of November, 2007.

                                ADVISOR'S DISCIPLINED TRUST 206

                                By FIXED INCOME SECURITIES, L.P., DEPOSITOR


                                By     /s/ ALEX R MEITZNER
                                  -----------------------------
                                         Alex R. Meitzner
                                       Senior Vice President

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below on November 19, 2007 by the
following persons in the capacities indicated:

  SIGNATURE              TITLE

Scott Colyer        Director of Sterling           )
                    Resources, Inc., the Member    )
                    of the General                 )
                    Partner of Fixed Income        )
                    Securities, L.P.               )

Jack Simkin         Director of Sterling           )
                    Resources, Inc., the Member    )
                    of the General                 )
                    Partner of Fixed Income        )
                    Securities, L.P.               )

Jim Dillahunty      Director of Sterling           )
                    Resources, Inc., the Member    )
                    of the General                 )
                    Partner of Fixed Income        )
                    Securities, L.P.               )

Joe Cotton          Director of Sterling           )
                    Resources, Inc., the Member    )
                    of the General                 )
                    Partner of Fixed Income        )
                    Securities, L.P.               )



                                       S-2



Randy Pegg          Director of Sterling           )
                    Resources, Inc., the Member    )
                    of the General                 )
                    Partner of Fixed Income        )
                    Securities, L.P.               )

Lisa Colyer         Director of Sterling           )
                    Resources, Inc., the Member    )
                    of the General                 )
                    Partner of Fixed Income        )
                    Securities, L.P.               )



                                By     /s/ ALEX R MEITZNER
                                  -----------------------------
                                        Alex R. Meitzner
                                        Attorney-in-Fact*




















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     *An executed copy of each of the related powers of attorney is filed
herewith or incorporated herein by reference as Exhibit 7.1.


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