Being relatively used in the literary theory and criticism (1970), social critic will acquire in a short time multiple explanations of terminology and will get a clear trend towards autonomy. The first attempts to define the social critic term belong to Claude Duchet and Edmond Cros. This article will focus on research conducted by Cros, who categorizes the social critic at the intersection of several disciplines as: structuralism, semiology, history, psychoanalysis, etc. Privileging the linguistic study of the texts. La sociocritique and Le sujet culturel presents a summary of this perspectives , being the expression of an integrated vision and incorporating the study of literature about methodologies researches on other social discursal practices.