The present research featured theoretical and methodological approaches to the study of aggression and aggressive behavior. The authors revealed a tendency to study aggressive forms of behavior from the standpoint of biological, sociocultural, and psychological factors, as well as mechanisms of formation, determinants of reward, and methods of diagnosis, control, and correction. The article focuses on the prospects of studying aggressive manifestations from the standpoint of analysis of personality formation and self-awareness. The structure of self-conception in aggressive individuals appeared to be deformed. Researchers explain the deformation by the gap between Me-real and Me-ideal, impaired behavioral regulation methods, and problems of self-conception. The authors also revealed the importance of factors that increase the level of aggressive behavior in adolescents, namely unfavorable styles of family relations, poor participation in the educational process, peer pressure, etc. Predisposition to aggressive behavior can be associated with a small repertoire of constructive coping strategies, poor cognitive abilities, and difficulties in controlling and regulating emotions. The empirical research featured the psychological characteristics of the aggressive behavior of juvenile offenders in the context of character accentuations and personal selfconception. The authors studied the differences between the aggressive behavior of juvenile delinquents and the control group. The analysis detected connection between character accentuations and forms of aggressive behavior. The article illustrates the kinds of self-esteem and self-conception typical of adolescents with delinquent behavior experience.