The purpose of this study is to investigate a teacher’s strategies to attain the balance of social power among peers in the class. For this, participant observations and interviews were conducted 26 children and a teacher in Saemmul class of 5-year-olds as the research participants from March to October 2019. As a result, the class teacher supported to check the social power in the class so as not to be biased and to help balance the power between peers. This teacher s support could be divided into support strategies for all children in the class and Hyung-Jun, who negatively uses social power. Specifically, these Strategies were observed ‘announcing’, ‘sharing through situational reenactment’, ‘forming new groups’, ‘understanding peer relationships’, and ‘empowering’ for class children, and ‘monitoring’, ‘persuading’, ‘ignoring’, ‘accepting’, ‘giving back’ for Hyung-jun. This study is significant in that it presented the practice of the teacher’s specific role for the formation of a balanced social power among peers in the class. Also, the need for follow-up research on the appropriate level and method of intervention was suggested to an in-depth discussion about the role of the teacher.