European economic integration is a specific feature of the evolution of the European economy in the postwar period (a phenomenon which occurred in Western Europe) and is a process of construction of an integrated and functional institutions, policies and economic instruments, following an agreement free- agreed by the participating states in order to economic and social development and defense of common political interests and national security. A so-called process of "economic integration" was produced in Eastern Europe as CMEA, but he was forced by Soviet socialist states. He was rather a process of economic subordination, so that Member States were Moscow's guidelines.

In the present paper I analyzed the European economic integration of European Union.

KEYWORDS: integration; European Integration; early and advanced integration; customs union; convergence; Monetary Union; fiscal union; optimum currency area.