The author represents an analysis of tendencies in forming of social classes as the subjects which realize their interests and can defend them in Ukraine during the period of independence. The theories of social classes (K. Marx, P. Bourdieu), social conflicts (R. Dahrendorf) and social movements (O. Ramstedt) have been employed for conceptualization of formation mechanism of classes as social actors. Materials of statistics, in-depth interviews, data of the national and international comparative projects were used to analyze the dynamics of strike movement in Ukraine and the factors affecting it, to study the subjects of the labour movement, the extent of participation of representatives of social classes in trade unions and political parties, as well as the level of their trust to these organizations. It is concluded that the working class, which was the first to obtain the mobilizational experience in settling the labour conflicts, was not a leader of protest movement in the period of the last twenty years. At the same time, the middle class and petty bourgeoisie obtained the experience in defence of their interests. A comparative analysis demonstrates that the labour movement in Ukraine and Western countries had similar tendencies: it was characterized by non-uniformity (booms and recessions, up to its full damping), motivation by mainly economic slogans, transfer from the form of direct mobilization of collective actions to institutionalized ones (trade-union and individualized defence of interests). The alternative scenarios/prospects of the class action have been considered in conclusion.