Puberty is considered a period of crisis with radical physical and biological transformations. Due to them, the adolescent becomes nervous and aggressive towards others. Many specialists conclude that the development of social competence helps preadolescents avoid conflicts with others and delinquent behavior. The purpose of the research consists in acquiring new theoretical information and testing the social competence development program for contemporary preadolescents. The psychological intervention program elaborated by us exemplification, role play consolidation, integration. At the end of the program, in the retest, the preadolescents scored higher in social skills and lower indices in the manifestation of aggressive behaviors.