The purpose of this study was to examine what experiences and meanings of art therapy experience by a child with encopresis who showed emotional and behavioral problems, and the study used a qualitative case study method. The study participant was an 8-year-old boy in 3rd year of his elementary school who was diagnosed with encopresis. He received a total of 20 sessions of personal art therapy for 60-80 minutes once a week from Apr. 1 to Sep. 23, 2022. The therapy process was designed based on Kohut's central concept of self-psychology, self-object and empathic relationship with self-object, Rogers' human-centered expressive therapy theory theory, ETC based media use and appreciation of famous paintings. The program was structured by the treatment method(Yeoju Jeong). The data collected from research participants were analyzed by the three qualitative data conversion methods proposed by Wolcott: description, analysis, and interpretation. As a result, a total of 4 high-level themes and 11 sub-topics were derived. It was summarized as adapting to the art therapy environment, revealing emotions , improving positive self-awareness and expression through successful experiences, and building identifying his self. A child with epilepsy who had emotional and behavioral problems positively changed his daily life based on stable self-expression and improved self-regulation Based on this, the significance and limitations of this study were discussed.