In this experiment based on play therapy theory, we examined how small group activities using Emotion Play Program affect empathic and prosocial behavior of children with autism spectrum disorder. With 20 sessions, We studied 5 children in elementary school special class. In empathic behavior, such as the responses to the emotions; pleasures(good), Anger(angry), Sadness(crying). We verified it for with Wilconx verification which is nonparametric test. In research result, the children in the population showed emotional change starting to express their own feeling accurately. Second, about the effect of small activities using Emotion Play Program on prosocial behavior(P < .05), there was a result which shows meaninglessness, with .074, in sociality section. However, in play activities section and personal relations section, there were meaningful results with .038 and .039 respectively. Based on this research, we presented, as a implication, the necessity for varied Emotion Play Activities for children with autism spectrum disorder.