In connection with the current situation of geopolitical tensions and application of sanctions, the issues of energy security that make it possible to provide reliable and uninterrupted energy supply to national economies as well as consumers of all categories and levels at an affordable price become particularly relevant for the member states of the Eurasian Economic Union (hereinafter referred to as the member states and the Union respectively). One of the key areas of integration defined by the Treaty on the Eurasian Economic Union (hereinafter referred to as the Treaty), which was signed by the Presidents of countries on May 29, 2014, is energy, which, to a large extent, determines the dynamics and the rates of development of national economies, their competitiveness in the world markets, and the standard of living of the population. In accordance with Article 79 of the Treaty, the member states agreed to pursue a coordinated energy policy and develop mutually beneficial cooperation with due account for provision of energy security. Pursuant to Article 81 of the Treaty, the member states jointly with the Energy Department of the Eurasian Economic Commission are actively engaged in the stepby-step formation of the common electricity market of the Union (hereinafter referred to as the CEM). The principles of its formation specified in the Concept for the Formation of the CEM of the Union also contain provisions on ensuring energy security of the member states with due account for preservation of peculiarities of the domestic energy markets of each of the states. Therefore, it seems relevant to study the problems of legal regulation of energy security in the electric power industry in the member states of the EAEU.