The concept of political: is political science possible?

In the article basic concepts of political science - polity and political, are discussed. The author formulated criteria of social phenomena belonging to the sphere of political and defined the position of the political sphere in social system and its interrelation with economic, social and cultural spheres. The urgency of the problem of the subject certainty of political science is shown, the author also formulated the approaches to its solution. The author believes that this publication will decrease a degree of uncertainty in the question of political science subject.