The language phenomena in psychosis are proof of the undeniable relationship between language and unconscious. That is what the analysis of Schreber case show us. This dissertation is concerned to demonstrate the importance of language for the reasoning of the psychoanalysis. We say that language has always been present in the work of Freud, even before psychoanalysis was constituded as such. From the moment that Freud takes it as a symbolic is easy to establish the relationship between the symbolic, as one of three instances theorized by Lacan, and the Freud symbolic. We followed the trail left by Freud when he says that the reality of psychosis has a symbolic meaning that we must discover. The lacanian symbolic is formulated with the loan of a number of concepts from linguistics. Upon rereading that Lacan makes of them, it is possible to define the unconscious by the book, as a language that articulates discursively. Armed with this understanding it can proceed in dealing with the question of Psychosis, defining it as a distinct structure of neurosis since a mechanism wich is itself subjective.