This study applied a bibliotherapy program based on play-oriented interaction to lower-graders in elementary school and examined its effect on the ability to adapt to school life. For this purpose, reading therapy research was conducted using research subjects consisting of ordinary second graders in elementary school located in District K, Seoul. Total of twelve ninety-minute sessions of the reading therapy program were implemented in school library once or twice a week. Adaptability to school life was tested before and after the reading therapy program and the Kinetic School Drawing (KSD) test, which was conducted before and after the implementation of reading therapy program. The results of this study can be summarized as follows; First, the reading therapy program based on play-oriented interaction was proven to have a positive impact on overall adaptation of second graders in elementary school. Second, among the sub factors of the adaptability to school life among the second graders in elementary school, reading therapy program based on play-oriented interaction positively affected teacher relation, peer relation, school lesson, and compliance with the school rules.