This study aims to determine the use of media facebook on students, and to determine the role of facebook media to increase the motivation to learn PAI students in SMPN 2 Lanrisang. This type of research is descriptive qualitative research. Qualitative method, preferably observation, interview, documentation. This research used Dougherty & Pritchard theory in Bauer. That is Role perception and Role Expectation, with aspect of role: a) Impersonal, b) Working behavior, c) Controlling, d) Behavior change, and e) Various role / activity. The results of this study were: 1) media faceboook has been used in students SMPN 2 Lanrisang, Facebook for the students SMPN 2 Lanrisang not only serves as a social network but has become a medium of learning with the use of group features in facebook media. 2) facebook media contributes to the improvement of students' learning motivation in SMPN 2 Lanrisang, especially on learning of Islamic Religious Education, this is seen among the students who are active in the group facebook PAI