The paper starts from the premise that prevention and treatment of juvenile offenders an integral part of social policy and social welfare. Social welfare institutions are the key segment of organized and formal systems of social reaction to juvenile delinquency. The most general role of the modern social welfare system that was developed is dealing with the protection of the interests of children and juveniles. Social services start from the premise that the crime of children and juveniles in the manifestation of social development and meeting their social needs. The paper critically evaluate national experiences in the prevention of juvenile delinquency in the social welfare system. Also, the paper gives examples of European and regional ...