Pain is a central problem of the modern Western being, a key issue in Descartes' thought, which generates a rupture in the mode of representation of the individual and his psychological experience of the body. In this epistemological and political reorganization, psychoanalysis is the most elaborate and profound discourse on this problem. This thesis inquires into the way Freud dealt with pain and the differentiations produced by Lacan, supported by his critique of the modern individual and his experience of the his own body. If according to Freud pain was an explicit problem, situated since his earliest psychoanalytical research as the most primitive and fundamental experience of the psychic apparatus, in Lacan it is presented as a problem yet to be resolved. In this investigation, therefore, we start from pain as being in the body, ineffable and mute, to revisit its place in Freud's and Lacan's foundations of psychoanalysis, for which we distinguish a "body affected by the word" from the body-languaje entity. In short, it is about the question of the relations between the parlêtre and its body, which allows us to review some theoretical, clinical and political consequences