The article focuses on the study of various theoretical and scientific researches in social self-determination - an important factor of maturity. The author of the article examines and clarifies the aspects specific to formation of self-determination. This factor is underlying for social maturity in the transition of an adolescent to adulthood. Selfdetermination is widely studied within general psychology, personality psychology, social psychology. Such authors as K. Jung, A. Adler, E. Erickson, A. Maslow, K. Rogers, M.R. Ginzburg, K.A. AbulkhanovaSlavskaya, N.S. Pryazhnikov, E.I. Golovakhi, E.F. Seer, E.A. Klimov., and others made an essential contribution to the study of self-determination. In this context, self-determination of adolescents is presented through the analysis of scientific attitudes related to various methodological and theoretical approaches. Studying self-determination in adolescence and its peculiarities as a concept is the current focus of the undertaken study. The content of the article highlights the relevance of the research carried out.