This manual examines the history of the formation and development of a unique integration association - the European Union, its legal nature, institutional and legal system, the specifics of competence and the law-making process. Attention is paid to the implementation of the common foreign policy and security policy of the European Union, as well as the legal regulation of the internal market and the space of freedom, security and justice in the European Union. In preparing the manual, foreign doctrine and the law enforcement practice of the Court of the European Union were used. For students of the specialties “Jurisprudence” and “ International Law", graduate students, teachers, researchers, specialists in the field of European integration and all interested readers.