Transnational approach, also called as transnationality or transnationalism, serves to the illumination of the creature and forms of interactions among large social groups, as political parties, organized labour unions, social movements, occupational categories etc. which undertook the activity in the international environment, developing from the national level networks above state-structures. The aim of the article is to present a theoretical-methodological proposal for analyzing the increasing role of transnational organizations and associations that by force of their influence showed arena of deliberation and political dialogue in the area of decisionmaking processes in the institution of European Union and member states.