RECKSON OPERATING PARTNERSHIP, L.P.

                                  EXHIBIT 31.1

   CERTIFICATION OF SCOTT H. RECHLER, CHIEF EXECUTIVE OFFICER AND PRESIDENT OF
  RECKSON ASSOCIATES REALTY CORP., THE SOLE GENERAL PARTNER OF THE REGISTRANT,

                   PURSUANT TO RULE 13a - 14(a)/15(d) - 14(a)


I, Scott H. Rechler, certify that:


     1.   I have  reviewed  this  quarterly  report  on  Form  10-Q  of  Reckson
          Operating Partnership, L.P.;

     2.   Based on my  knowledge,  this  report  does  not  contain  any  untrue
          statement  of a  material  fact  or  omit to  state  a  material  fact
          necessary to make the statements  made, in light of the  circumstances
          under which such  statements were made, not misleading with respect to
          the period covered by this report;

     3.   Based on my knowledge,  the financial statements,  and other financial
          information  included in this report,  fairly  present in all material
          respects the financial condition, results of operations and cash flows
          of the  Registrant  as of,  and for,  the  periods  presented  in this
          report;

     4.   The Registrant's  other  certifying  officer and I are responsible for
          establishing  and maintaining  disclosure  controls and procedures (as
          defined  in  Exchange  Act  Rules  13a-15(e)  and  15d-15(e))  for the
          Registrant and have:

               a)   designed such disclosure controls and procedures,  or caused
                    such disclosure controls and procedures to be designed under
                    our  supervision,   to  ensure  that  material   information
                    relating  to  the  Registrant,  including  its  consolidated
                    subsidiaries,  is made  known to us by others  within  those
                    entities,  particularly  during  the  period  in which  this
                    report is being prepared;

               b)   evaluated the  effectiveness of the Registrant's  disclosure
                    controls  and  procedures  and  presented in this report our
                    conclusions   about  the  effectiveness  of  the  disclosure
                    controls and procedures, as of the end of the period covered
                    by this report based on such evaluation; and

               c)   disclosed  in this  report  any  change in the  Registrant's
                    internal  control over  financial  reporting  that  occurred
                    during the  Registrant's  most recent  fiscal  quarter  (the
                    Registrant's  fourth fiscal quarter in the case of an annual
                    report)  that  has  materially  affected,  or is  reasonably
                    likely  to  materially  affect,  the  Registrant's  internal
                    control over financial reporting; and

     5.   The Registrant's other certifying officer and I have disclosed,  based
          on our most recent  evaluation  of  internal  control  over  financial
          reporting, to the Registrant's auditors and the audit committee of the
          Registrant's  board of directors (or persons performing the equivalent
          functions):

               a)   all significant  deficiencies and material weaknesses in the
                    design or  operation  of  internal  control  over  financial
                    reporting  which are reasonably  likely to adversely  affect
                    the Registrant's ability to record,  process,  summarize and
                    report financial information; and

               b)   any fraud, whether or not material, that involves management
                    or  other  employees  who  have a  significant  role  in the
                    Registrant's internal control over financial reporting.


Date: November 2, 2004
                                      /s/ Scott H. Rechler
                                      --------------------------------
                                      Scott H. Rechler
                                      Chief Executive Officer and President of
                                      Reckson Associates Realty Corp.,
                                      the sole general partner of the Registrant