This study sought to investigate the effect of adapted physical education (APE) courses and practica on pre-service teachers' self-efficacy (SE) towards inclusive physical education (PE) for students with intellectual disability (ID) and autism. Three hundred and fifty-six students (male = 254, female = 102) enrolled in adapted physical education teacher education (APETE) programmes in Korea participated in a specially developed survey which was analysed using multilevel modeling. The results of a multilevel modeling analysis revealed that APE courses and practica do indeed have a significant effect on the pre-service teachers' SE towards teaching students with ID and autism in general PE classes. Study participants reported that taking more than 15 APE credits significantly improved their level of SE.