In the past, annual student evaluation of counselor effectiveness at Moraine Valley Community College (Illinois) has been conducted by means of three unvalidated instruments. In order to achieve increased accountability, a student services committee has developed a conceptual design for a comprehensive counselor effectiveness evaluation system. As a component of the larger system, a valid and reliable diagnostic instrument was developed for student evaluation of individual counseling services. This instrument was designed with a semantic differential scale to measure the effectiveness of three different counseling processes (acceptance of client, counselor self-acceptance, counselor support), and two counseling outcomes (conference worthwhileness, client independence). A jury of counselors, counselor educators, and counselor administrators confirmed the content and construct validity of the instrument. Construct validity was also demonstrated by means of a principal components analysis of 281 student evaluations of 11 counselors. Internal consistency reliability coefficients confirmed the multidimensionality of the instrument. A survey of the literature on counselor evaluation is presented, as are complete statistical results of the jury evaluation and preliminary application of the instrument. The instrument itself is appended. (Author/NHM)