This lecture notes contains elements of 13 lectures, program material of discipline, problems for analysis and discussion, a list of literature and internet resources. People's vital activity is various. It includes upbringing, education, medical service, rest, science, culture, production. All this spheres of vital activity are closely connected and form united social system, which contains three subsystems: social-cultural, political-administrative, and economic. Each of these systems is mostly independent and has its own laws of functioning. The most important among these systems is economic, because it provides all the people's vital activity and satisfies their primary needs, spiritual one. Necessity of satisfaction of different needs induce people to economic activity, production of money profits and services. Exchanging with results of their labor, economic activity subjects (individuals, collectives) enter into special economic relations, which are an object of learning economic science, and, specifically, economic theory.