Introduction. The article deals with the theory of law by Nicholas Luhmann as one of the most important conceptual and methodological sources of Western communicative theories of law developed in the context of post-metaphysical thinking in social theory. Theoretical analysis. In the social system of Luhmann, communication communicates, so the concept of Luhmann belongs to the number of non-subjective ones. The legal system in this concept is formed by the diff erentiation of communications, thanks to which a legal co de arises.