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                      RECKSON OPERATING PARTNERSHIP, L. P.
                                  EXHIBIT 31.1
    CERTIFICATION OF SCOTT H. RECHLER, CHAIRMAN OF THE BOARD, CHIEF EXECUTIVE
      OFFICER, PRESIDENT AND DIRECTOR 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)) and internal
             control over financial reporting (as defined in Exchange Act Rules
             13a-15(f) and 15d-15(f)) 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)  designed such internal control over financial reporting, or
                 caused such internal control over financial reporting to be
                 designed under our supervision, to provide reasonable assurance
                 regarding the reliability of financial reporting and the
                 preparation of financial statements for external purposes in
                 accordance with generally accepted accounting principles;

             c)  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

             d)  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 Reckson Associates Realty Corp., the sole general
             partner 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: August 8, 2005
                                /s/ Scott H. Rechler
                                -----------------------------------------------
                                Scott H. Rechler
                                Chairman of the Board, Chief Executive Officer,
                                President and Director of Reckson Associates
                                Realty Corp., the sole general partner of the
                                Registrant