The research aims to investigate the relation established between the categories of alienation, fetish and conscience according to Marxian theory. This theme received attention from scholars because of its complexity, allowing us to approach some of Marx and Engels most important works, such as Os Manuscritos econômico-filosóficos de 1844, A sagrada família,Teses sobre Feuerbach, A ideologia alemã, A miséria da filosofia, o Manifesto Comunista, os Grundrisse and O Capital. We also based our research in recent authors of the Marxist tradition: Michel Lowy; Itsván Mészáros; José Paulo Netto; Adolfo Sánchez Vázquez, Mauro Luis Iasi, Roman Rosdolksy and others. The dissertation is divided into two chapters. In the first chapter we seek to prese...