The subject of this research is the public diplomacy mechanism of the Russian Federation. The goal consists in consideration of the mechanism of functionality of public diplomacy of the Russian Federation based on the framework government documents, reports on the activity of the structures of public diplomacy of the Russian Federation, and expert analytical articles. The author examines the foreign policy concepts of the Russian Federation of 2000, 2008, 2013 and 2016, as well as reveals their structures and areas of focus. Analysis of the discourse of research on the public diplomacy of the Russian Federation allowed determining the gaps and the problematic areas that require further research. The article presents examples of the projects that were implemented in the indicated directions in accordance with the latter concept. In conclusion, the author outlines the development trends of public diplomacy mechanism of the Russian Federation. The mechanism of public diplomacy of the Russian Federation is an ambiguous phenomenon and still in the making. On the one hand, the understanding of “soft power” on the state level has evolved significantly in recent years. Moreover, the author traces the evolution of terminological field of public diplomacy in the official documents, as well as its objectives and development trends. On the other hand, the question of coordinating body within the mechanism of public diplomacy of the Russian Federation remains open and relevant. Attention of researchers is also focused on the actors and level of their engagement into the system, interaction between the elements within and outside the mechanism. At the same time, public diplomacy projects are implemented by the Russian Federation worldwide; they coordinate with the trends set by intergovernmental organizations, and appear to be quite effective with regards to provision of information support. The trend of digitization of international policy poses new challenges for the public diplomacy structures, which would require an evolution in understanding of the concept.