The purpose of this study is to determine the effect of musical play on the social skill development of third-grade students and to investigate the opinions of classroom teachers on the effect of musical play on the social skill development of their students. The study sample consists of 60 students: 30 in the experimental group, and 30 in the control group. Musical play activities were applied in the experimental group for 10 weeks. At the end of the research, interviews were conducted with both the experimental and control group classroom teachers. The results demonstrate a significant difference, in of the experimental group, between the posttest total scores, adjusted according to the students' social skills scale pretest total score averages. According to the answers to interview questions from the classroom teachers, musical play is beneficial for the development of social skills.