The purpose of this study was to investigate the experience of cooperative physical expression activities at a kindergarten on young children s prosocial behavior. Participants for the study were 46 four-years-old and children attending two kindergartens attached to the public kindergarten in D and S city, GangWon-do. The results of the study were as follows. The experience of cooperative physical expression activities at a kindergarten made statistically significant group differences of young children s prosocial behavior(p<.001). This means that cooperative physical expression activities had positive effects on young children s prosocial behavior. First, cooperative physical expression activities made statistically significant group differences of young children s leadership (p<.001). This means that cooperative physical expression activities had positive effects on young children s leadership . Second, cooperative physical expression activities made statistically significant group differences of young children s helping (p<.001). This means that cooperative physical expression activities had positive effects on young children s helping . Third, cooperative physical expression activities made statistically significant group differences of young children s communication (p<.001). This means that cooperative physical expression activities had positive effects on young children s communication . Forth, cooperative physical expression activities made statistically significant group differences of young children s initiative consideration (p<.001). This means that cooperative physical expression activities had positive effects on young children s initiative consideration . Fifth, cooperative physical expression activities made statistically significant group differences of young children s approaching (p<.001). This means that cooperative physical expression activities had positive effects on young children s approaching . Sixth, cooperative physical expression activities made statistically significant group differences of young children s sharing (p<.001). This means that cooperative physical expression activities had positive effects on young children s sharing . Seventh, cooperative physical expression activities made statistically significant group differences of young children s empathy and self-control (p<.001). This means that cooperative physical expression activities had positive effects on young children s empathy and self-control .