Introduction: The study of human subjectivity, processes and conditions of its formation was one of the significant trends in the development of various directions and branches of Russian psychological science throughout the past century.In our study, the structure of subjectivity is defined as the level of expression of its components: activity, awareness of the capacity for reflection, freedom of choice and responsibility for it, awareness of one's own uniqueness, understanding and acceptance of the other individual and self-development.The article deals with the problems of personal development and computer games addiction of younger adolescents. The results of the study aimed at revealing the degree of computer games addiction among adolescents and the structure of their subjectivity are presented.Results: To diagnose the computer games addiction of adolescents, a specially developed questionnaire was developed, which includes five main scales: an emotional attitude towards computer games; self-control in a computer game; purposeful focus on computer game; the parental relation to a computer game; preference for virtual communication instead of the real one. A sample of 146 students aged 10 to 11 years established significant differences between boys (N = 72) and girls (N = 74) in the level of computer game addiction.The structure of subjectivity, as an integrative property, expressed in relation to a person to himself as an agent, in a conscious and active attitude to the world and himself in it, was diagnosed with the questionnaire "The structure of the subjectivity of the younger adolescent."It was found that boys are more likely to suffer from computer game addiction; girls are only interested in computer games. Features of subjectivity of adolescents of different sex "addicted" and "interested" in computer games are analyzed. Younger teenagers with a high level of computer game addiction have lower development quotient of such components of subjectness as the development of conscious activity, the ability to reflect, the ability to understand and accept another person. The components of subjectness are described that allows leveling out the negative effects of the existing computer gaming addiction among adolescents, to reduce the risk of its high level occurrence.Discussion and conclusions: The development of the subjectivity of the child has its own specifics at different ages, however, in studies devoted to the development of subjectivity in onegene [2, 7, 12], there is a heterogeneity in the development of individual components of subjectness, marked heterochronicity and, at the same time, the absence in childhood of subjectivity as an integral property.In the youngest adolescence, such components of subjectivity as activity, awareness of the ability to reflect, freedom of choice and responsibility for it, the awareness of one's own uniqueness, understanding and acceptance of the other person, self-development develop most dynamically. The formation of these components is determined, first of all, by the social environment in which the child lives and by the quality of the child's relations with the surrounding people. If the environment and interaction environment is characterized by poverty and homogeneity of incentives for development, then younger adolescents begin to look for these conditions in a computer game.