Article presents the results of the social and psychological monitoring of union members of four high schools of Moscow, conducted in March and June 2016 on a sample of 419 people: 200 students and 219 teachers. The present part of the article discloses the motives of students’ membership in the university union; the main directions of the university union activities are also outlined. Among the main motives there are: the realization of social life activity, assistance, support and protection of the union members’ rights; personal and professional growth; participating in cultural enlightening, sport events and health improvement. Reasons for students’ lack of interest when joining the union are as follows: lack of understanding of the organization functions, unwillingness to pay fees, low credibility of the trade union organization, certitude in ability to protect own rights by themselves. The students consider greater awareness about the activities of the trade union committee to be one of the terms of increasing university union membership. Besides, the increase of trade union’s activities and of consciousness levels are the other important terms.