Aims: It is necessary to design some comprehensive questionnaires with generable questions explaining the main variables of the test in order to use students' views efficiently for the evaluation of academic staffs' performance. So, the aim of the present study was to examine the reliability and validity of the academic staffs' evaluation by students' questionnaire.

  Methods: This survey research was conducted among Gilan university student in 2009-10 and 626 students were selected using random sampling method from among the five faculties. In order to assess the validity of academic staffs' evaluation questionnaire, a researcher-made questionnaire including 99 closed-ended questions. To determine the reliability using the agreement coefficient from the academic professors' forms completed by students, 26 samples of agricultural faculties, 42 samples of technical faculty, 66 samples of humanities faculty were analyzed according to the population of faculties.

  Results: The content validity of some components of principal questions was less than %30 and has not a little relationship with the main question. The obtained agreement coefficient was high for all questions. In technical engineering faculty, 11th question and in agricultural faculty, physical education and basic sciences faculties the 13th and 14th questions and in humanities faculty, 6th, 11th, 12th and 13th questions enjoyed the highest agreement.

  Conclusion: The content validity of Gilan academic staffs' evaluation questionnaire is low for some questions. In terms of reliability (agreement coefficient) of the questionnaire's question, although all were enjoying high reliability, however, this agreement coefficient differs from one faculty to the other one.