Departing from a Constructivist view, this Msc. Dissertation has as its subject of research the analysis of Brazilian international image as a middle power - idea that can be found throughout the process of national identity construction - projected by Cardoso s government (1995 - 2002). The perspective of the international system as asocial milieu demonstrates the importance of social factors and cognitive elements in the study of foreign policy analysis. This Msc. Dissertation inquires into the concepts of middle power under four analytical dimensions - material capabilities, influence, selfperception, and recognition - questioning the concept to reveal the theoretical aspects found in the Brazilian understanding of middle power. Throughout the Brazilian Republican History, the Diplomats have developed their own concept of middle power. They gave a more cognitive and less materialist sense to a concept traditionally associated with a materialist point of view. Therefore, this research demonstrates from a social logic of interaction how the image of Brazil as a middle power was constructed during Cardoso s government by the statements of change and continuity in such multilateral international forums as the UN and WTO.