Exhibit
31.1

Reckson Operating
  Partnership, L. P.

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.;                                                                                                                                                                                                                                                                 
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|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;                                                  
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|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;                                                                     
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|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:                        
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|   | a)                                                                                                                                                                                                                                                                                                                                                          
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|   | b)                                                                                                                                                                                                                                                                                                                                                          
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|   | c)                                                                                                                                                                                                                                                                                                                                                          
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|   | d)                                                                                                                                                                                                                                                                                                                                                          
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|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):
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|   | a)                                                                                                                                                                                                                                                                                                                                                          
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|   | b)                                                                                                                                                                                                                                                                                                                                                          
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|Date: November
    7, 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

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