European Union lives the period of changes. Overcome its old concepts and doctrines, it is strength developing longer and deeper, trying to adapt its legal-political organization to the calls and necessities of the XXI century. One the most important questions of legal statue of European Union, is the question about the diffusion’s level of its legalinternational cover into a new state alike quality. This question preoccupies a lot of minds: politics and citizens, scientists and students, businessmen and bureaucrats. Today is no longer actual the question about, are o not created United States of Europe. Their obviously are in the process of forming, moreover they already exist but remains a not less sophisticated question, what does they represent by themselves, which is their legal nature.