This study aims to exhibit how the sportsmanship level of secondary school students relates to their success regarding the religious culture and knowledge of ethics course (RCKEC). The research was made on 609 students attending public schools in Erzincan city center during 2016 to 2017 academic year. "Physical Education Course Sportspersonship Behavior Scale" (PECSBS), a form for collecting personal details and RCKEC success averages obtained using the e-school system were utilized in the study. Scores of students that they received from the sportsmanship scale were examined by their school types, grades, genders and favorite sports. Besides, a Pearson correlation analysis was made between sportsmanship scores of the students and their RCKEC success averages. Data showed a significant level of differentiation in physical education course sportsmanship behaviors in terms of school type (in favor of regular secondary schools), gender (in favor of females), grade (against grade 8 students) and favorite sport (in favor of sports without physical contact). Furthermore, a positively significant relation was observed between physical education course sportsmanship behaviors (factor of avoidance negative behavior and total sportsmanship averages) and RCKEC success averages. Inclusion of activities supporting sportsmanship practices into religious culture and knowledge of ethics courses with an interdisciplinary education approach which appeared to be beneficial. On the other hand, low sportsmanship scores were obtained for religious vocational secondary schools compared to regular ones. The argument that the fact that religious vocational secondary schools have only one hour of physical education course per week, restricts sports culture learning outweighed.