1 THE EFFECT OF GROUP COUNSELING SERVICE TOWARD THE ENHANCEMENT OF STUDENTS’ PHYSICAL SELF-CONCEPT AT X MIA GRADE OF SENIOR HIGH SCHOOL 2 PEKANBARU Sesi Pujiasti 1 , Raja Arlizon 2 , Tri Umari 3 Email: Sesi.Pujiasti18@gmail.com, Rajaarlizon59@gmail.com, Triumari2@gmail.com No. HP: 085870193698, 08127653325, 08126858328 Program Studi Bimbingan dan Konseling Fakultas Keguruan dan Ilmu Pendidikan Universitas Riau Abstract: This research is aimed to find out the effect of group counseling service toward students’ physical self-concept at the experiment group. The methodology of this research is real-experimental method with control group experiment. The sample of this research was 20 students of X MIA Senior High School 2 Pekanbaru. The result of this research is to find out the difference between post test at the experiment group and post test at the control group, the researcher used SPSS program with Mann Whitney formula and got the result Z = -2.734 with sig. (2-tailed) is 0.006. Because of the value of sig. (2-tailed) 0.006 < 0.05, therefore, it can be concluded that “there is a significant difference between post test of students’ physical self-concept at the experiment group and post test of students’ physical self-concept at the control group” and for the contribution of group counseling service toward students’ physical self-concept is 13.6%. Keywords: Group Counseling Service, Physical Self-Concept