This study aimed to verify the effects of group play therapy with a focus on physical contact on ego-resilience and peer competence in non-disabled siblings with disabled siblings. The participants were 10 non-disabled siblings who wished to participate, selected from disabled siblings attending a child development center in City A. They were divided into an experimental group (5 participants) and a control group (5 participants). The experimental group received group play therapy sessions centered around physical contact once a week for a total of 10 sessions, each lasting 60 minutes. Data analysis was performed using SPSS 26.0 statistical software, and the results of this study are as follows: First, the group play therapy with a focus on physical contact significantly improved the overall ego-resilience scores of non-disabled siblings with disabled siblings, as well as the sub-factors of interpersonal relationships, vitality, emotional control, and optimism in the post-test. Second, the group play therapy with a focus on physical contact significantly enhanced the overall peer competence scores of non-disabled siblings with disabled siblings, as well as the sub-factors of sociability, prosocial behavior, and assertiveness in the post-test. Thus, this study demonstrates the significance of group play therapy with a focus on physical contact in improving ego-resilience and peer competence in non-disabled siblings with disabled siblings, contributing to their healthy internal state and facilitating positive peer relationships.