The aims of this study were to investigate the cognitive structure of the prejudice toward people with intellectual disabilities and to reveal the differences between undergraduate's courses. The results showed the prejudice toward people with intellectual disabilities had two important components (1. Level of normalization and 2. Avoiding contact), and the prejudice of the nursery and kindergarten teacher training courses had lower than those of the physical education teacher training courses only in level of normalization component. The results suggest that it is important to vary the education to improve prejudice according to the courses.