Exhibit (b)

                          IXIS Advisor Funds Trust II
                           Section 906 Certification

     In connection with the report on Form N-CSR for the period ended March 31,
2005 for the Registrant (the "Report"), the undersigned each hereby certifies to
the best of his knowledge, pursuant to section 906 of the Sarbanes-Oxley Act of
2002, that:

     1. the Report complies with the requirements of Section 13(a) or 15(d) of
the Securities and Exchange Act of 1934, as applicable; and

     2. the information contained in the Report fairly presents, in all material
respects, the financial condition and results of operations of the Registrant.


By:                                       By:
    ---------------------------------         ----------------------------------
President & Chief Executive Officer       Treasurer
IXIS Advisor Funds Trust II               IXIS Advisor Funds Trust II


/s/ John T. Hailer                        /s/ Michael C. Kardok
- -------------------------------------     --------------------------------------
John T. Hailer                            Michael C. Kardok

Date: May 23, 2005                        Date: May 23, 2005

A signed original of this written statement required by Section 906, or other
document authenticating, acknowledging, or otherwise adopting the signature that
appears in typed form within the electronic version of this written statement
required by Section 906, has been provided to the IXIS Advisor Funds Trust II,
and will be retained by the IXIS Advisor Funds Trust II and furnished to the
Securities and Exchange Commission (the "Commission") or its staff upon request.