The Hungarian Competition Authority has intensive international co-operation with the members of the European Competition Network (ECN) in the first place, but the professional co-operation in the frame of the Organisation for Economic Co-operation and Development (OECD) is also important, while the relations to Central-Eastern European competition authorities seems to be strengthening. The setting up of an OECD-Hungary Regional Centre for Competition in Budapest, the objective of which is to develop competition policy, competition law and competition culture and to help the work of the competition authorities of the region, has given new frames to the co-operation with Central-, Eastern- and South-Eastern European countries. The GVH also evolved close professional co-operation with the competition authorities of the United States and other countries.