Since the adoption of Law Decree No. 13 of 1979 on Private International Law (Old Code) both the legal environment of the EU and the Hungarian legal and social background have undergone substantial changes. Without questioning its progressive character, it must be stated that the Old Code wore the imprints of the era in which it was drafted. With the fall of the socialist system, the necessary amendments were made to the system of the Old Code, accelerated by Hungary’s accession to the EU. All the above played an important role in the Government’s order to begin work on the comprehensive modernization of the Old Code. The Act XXVIII of 2017 on Private International Law (New Code) entered into force on 1 January 2018. The present study focuses on the following topics: the reasons for the revision of the Old Code, the presentation of the relationship between the New Code and EU regulations in the system of legal instruments, and the review of legal institutions in the general part, with special attention to the major changes undertaken compared to the Old Code.