Exhibit (b)

                            Loomis Sayles Funds II
                           Section 906 Certification

   In connection with the report on Form N-CSR for the period ended
September 30, 2007 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 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:
Chief Executive Officer                Treasurer
Loomis Sayles Funds II                 Loomis Sayles Funds II

-------------------------------------  ---------------------------------------

/s/ Robert J. Blanding                 /s/ Michael C. Kardok
-------------------------------------  ---------------------------------------
Robert J. Blanding                     Michael C. Kardok

Date: November 28, 2007                Date: November 28, 2007

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 Loomis Sayles Funds
II, and will be retained by the Loomis Sayles Funds II and furnished to the
Securities and Exchange Commission or its staff upon request.