Objectives : This study aimed to find out the changes in the social interaction of maladjusted infants who participated in group art program, which was based on the object relations theory focusing on mutual holding environment of healthy mother-child relationship. Method: The subjects of this study were three infants aged 2 to 3 years old who attended I daycare center in Gyeongsangnam-do. Two boys aged 3 years old showed anxiety or aggressive behavior, and one two-year-old girl showed isolated behavior. From August to November 2022, the group art program was conducted once a week, totally 12 sesssions by a professional specialist in art therapy. The changes in social interaction were analyzed qualitatively based on the recordings and observations of each session. Results: The analysis revealed changes in the 3-year-old boy with anxiety in terms of activeness, togetherness, and verbal expression. He became more active in exploring art materials as well as participating in activities, increasing mutual exchanges with friends and verbal expressions. The 2-year-old girls showed isolated behaviors was analyzed in terms of interest in objects and self-expression. She showed more interest in her surrounding, increased activities with friends and self-expression. The 3-year-old boy conducted aggressively was analyzed in terms of impulsivity, coordination, and self-expression. His distractions decreased, time spent concentrating on activities after exploration increased, and following rules, coordinating with each other, and expressing himself increased Conclusion: Positive changes were observed in the target children, including improved positive attitudes toward themselves, interest in objects and consideration of others, and attitudes toward expressing their thoughts and feelings and asserting themselves appropriately. Such results were discussed that the group art program based on object relations theory, which seeks to heal relationships through healthy mother-child relationship experiences, is effective in children’s adaptive behavior by increasing comfort and psychological statility with the object.