Recently, students with pervasive developmental disorder (PDD) / Asperger's syndrome / high functioning autism increase in campus mental health. It is important for students to understand about them. We examined students in knowledge and appreciation about Developmental Disorder using questionnaire. Students who answered "I know about Developmental Disorder" were 119 (29.9%). Most students knew about Developmental Disorder through TV (46.5%), but many students had little knowledge about Developmental Disorder. So there is need for edification about PDD / Asperger's syndrome / high functioning autism.