EN
Many trends in economic thought dealt with the category of value, trying to figure out the sources. Value played an important role in economics of Karol Marks and in subjectivemarginalist trend. In theoretical considerations, modern economics not paying more attention to the category of value. Dispute over the source of value lost interest in economists. The main purpose of description is to present theory of value in terms of economy of Marks and in subjective-marginalist trend. This article also includes trial to answer the question, why modern economics does not pay sufficient attention to this economic category