A negative self-concept is a condition in which a person tends to view themselves badly. In general, children in conflict with the law tend to have a negative self-concept. Psychoeducation is one of the effective intervention methods to improve self-concept, through cognitive readiness by providing new understanding and information. The purpose of this study was to improve self-concept in children in conflict with the law by providing psychoeducational interventions. The subjects of this study were children in conflict with the law in Children's Social Home X, with total of 17 boys. The research method used is an experiment with the type of design in the form of a one group pretest-posttest design. Hypothesis testing was carried out on the pre and post tests of the Self Concept Questionnaire using Wilcoxon. The psychoeducational intervention was given in the form of material presentation, group discussions, games, and activities that were carried out in three sessions with a duration of one hundred minutes in each. The results showed an increase in self-concept after being given psychoeducation on subject.