The article discusses the creation by young people of a concept of their own lives during adolescence, which is treated as a sign of their subjectivity and autonomy. What was emphasised therein was the significant relationship between the creation of the own life concept by adolescents and their overall development during adolescence. Deliberations were based on the theoretical concepts of Piaget and Niemczyński, as well as in the empirical studies of Nuttin, Nurmi, Zaleski, Trempała, Liberska, Katra, and Czerwińska-Jasiewicz. An extended (...) author’s own model of the creation of an own life concept by adolescents was also presented. This model indicates the main elements of the own life concept of adolescents and the main factors that have an impact on the creation of this concept by them. Conclusions formulated on the basis of the author’s own research were also presented. Further considerations constituted an attempt to substantiate the contention that the creation of the concept of their own lives by adolescents is a manifestation of their subjectivity and autonomy. (shrink)