Objective: This study investigated the effects of discussion using personality picture books on young children’s self-regulation ability and pro-social behaviors. Methods: Participants consisted of thirty-nine 5-year-old children who were going to a kindergarten in Gwangju metropolitan city. Nineteen children belonged to the experimental group and twenty children to the comparative group. The experimental group carried out discussion using personality picture books, and the comparative group carried out conversation activities. Results: The results of this study demonstrated that the experimental group scored higher than the comparative group in self-regulation ability and pro-social behaviors. That is to say, the experimental group scored higher than the comparative group in three sub factors of self-regulation ability and seven sub factors of pro-social behaviors. Conclusion/Implications: It is significant that this study provides useful information about discussion using personality picture books with young children that can be used in the early childhood field.