This article is devoted to the problem of subject development of students in uni- versity. A small student study group is explored as an environment for the subject development of students and a community that has its own potential to become a collective subject. The level of subject development, interconnection-interdepen- dence of group members, ability of group subject to implement different forms of group collective activity and to manifest as a subject of self-reflection are inves- tigated as essential characteristics of a small study group’s subjectity. An average and percentage indicators of the level of students’ subjectity development at dif- ferent stages of educational process in university are revealed on a sample of 24 small student study groups (N = 364 full-time students, age of respondents is from 17 to 25 years). The study of the correlation between the level of students’ subjec- tity development and subject characteristics, the level of subjectity development of their small study groups allowed to identify and to describe the qualitative fea- tures, the dynamics of the subject development of small study groups and students in the period of six-year education.