EXHIBIT 32.2

                                  CERTIFICATION

     The undersigned officer of DATATRAK International, Inc. (the "Company"),
does hereby certify, to such officer's knowledge, pursuant to 18 U.S.C. Section
1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002,
that:

     1.   the Company's Quarterly Report on Form 10-K for the year ended
          December 31, 2005 (the "Form 10-K") fully complies with the
          requirements of Section 13(a) or 15(d) of the Securities Exchange Act
          of 1934, as amended; and

     2.   the information contained in the Form 10-K fairly presents, in all
          material respects, the financial condition and results of operations
          of the Company as of, and for, the periods presented in the Form 10-K.


Dated: March 13, 2006                  /s/ Terry C. Black
                                        ----------------------------------------
                                        Terry C. Black
                                        Chief Financial Officer