Abstract: The object of this research is the professional training of Russian mediators within the framework of Master's Degree and vocational education. The subject of this research is the organizational and methodological problems of training and professional becoming of mediators, substantiated by the specificity of current legislation in this field, as well as the established practice of professional training. Application of general scientific methods allows examining the requirements of current Russian legislation in the sphere of professional training of mediators, comparing with the fundamental changes proposed in the draft law of the Ministry of Justice of the Russian Federation, and relevant practice. The author outlines the key vectors of professional training of future mediators offered by the Russian universities in the Master's Degree program. Based on the critical analysis of research and empirical methods (expert evaluation, survey), the authors determine the key personal and professional characteristics of the mediator, essential for successful their successful activity. The novelty of this work lies in drawing parallels between the requirements to professional training of mediators in the current legislation and according to the new draft law; as well as in the analysis of peculiarities and difficulties of professional training of mediators within the framework of the Master's Degree program “Mediation in Social Sphere” and competences that are considered of prime importance. The authors underline the need for raising requirements to the process of professional training of mediators, and their legislative consolidation. The top results can be achieved by acquiring basic legal or psychological education, as well as completion of the basic course of mediation prior to the advanced training.