Sanggar Y is a foundation formed as a place for children to develop their potential. The management of sanggar Y strives to provide education free of charge, the importance of education for the future of children encourages the sanggar Y organizer to save the country's children from poverty of science and ignorance. Negative self-concept problems experienced by foster children because they do not have the confidence to go back to school, feel shunned because they come from low-income families, work as street musicians. To overcome the problem of self-concept, researchers conducted an intervention namely psychoeducation. The development of self-concept is based on aspects of self-concept. Psychoeducation was held in 4 sessions in a span of 2 weeks. The purpose of this study is to examine the psychoeducation results of self-concept development. The subjects in this study were 15 foster children. The results of this study indicate the development of positive self-concepts. Foster children Sanggar Y began to believe in their ability to go back to school and no longer look negatively at themselves.