EXHIBIT - 99.906CERT


                           SECTION 906 CERTIFICATIONS

We, Peter E. Sundman,  Chief Executive Officer and Barbara Muinos,  Treasurer of
Neuberger Berman Income Opportunity Fund Inc. (the "Fund"), certify, pursuant to
18 U.S.C.  Section 1350 enacted under Section 906 of the  Sarbanes-Oxley  Act of
2002, that to my knowledge:

      1.   The Fund's  periodic report on Form N-CSR for the period ended August
           31, 2003 fully  complies  with the  requirements  of Section 13(a) or
           15(d)  of the  Securities  Exchange  Act of 1934 (15  U.S.C.  Section
           78m(a) or 78o(d); and

      2.   The information  contained in such Form N-CSR fairly presents, in all
           material respects,  the financial condition and results of operations
           of the Fund.


Date: December 31, 2003                     /s/ Peter E. Sundman
                                            ------------------------------------
                                            Peter E. Sundman
                                            Chief Executive Officer


Date: January 8, 2004                       /s/ Barbara Muinos
                                            ------------------------------------
                                            Barbara Muinos
                                            Treasurer and Principal Financial
                                            and Accounting Officer

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 906, has been  provided to the Fund and will be retained by the Fund
and  furnished  to the  Securities  and  Exchange  Commission  or its staff upon
request.

This  certification  is being furnished to the Commission  solely pursuant to 18
U.S.C.  ss.  1350 and is not  being  filed as part of the  Form  N-CSR  with the
Commission.