<DOCUMENT>
<TYPE>EX-32.1
<SEQUENCE>4
<FILENAME>ex32-1.txt
<TEXT>

                                                                    Exhibit 32.1


                CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350

                             AS ADOPTED PURSUANT TO

                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report on Form 10-Q of Franklin Street
Properties Corp. (the "Company") for the period ended September 30, 2007 as
filed with the Securities and Exchange Commission on the date hereof (the
"Report"), the undersigned, George J. Carter, President and Chief Executive
Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350,
that, to his knowledge:

      (1)   the Report fully complies with the requirements of Section 13(a) or
            15(d) of the Securities Exchange Act of 1934; and

      (2)   the information contained in the Report fairly presents, in all
            material respects, the financial condition and results of operations
            of the Company.


Date:  October 30, 2007                   /s/ George J. Carter
                                          ---------------------------
                                          George J. Carter
                                          President and Chief Executive Officer

</TEXT>
</DOCUMENT>
