The trends in comprehension of violence situations by juvenile delinquents characterized by heightened aggressiveness are analysed. Four types of adolescent aggressiveness are experimentally found. Those with different types of aggressive behaviour have differences not only in violence and humiliation comprehending but in psychological predisposition to aggression and in subjective inclination to take part in fights. It is shown that juvenile delinquents have distorted notions concerning permissible in human society means of defence of justice, human rights and dignity.