The dissertation has the objective of developing a study of the Freud s and the Lacan s theory about perversion. It is important to note that two different meanings of the word perversion can be found in the Freud s metapsychology: one, of a structural order, refers to the aberrant nature of the infantile sexuality,which does not conform to a natural or instinctive pattern; and the other corresponds to a psychic dynamics based on the disavowal of the castration, and has fetichism as its paradigm. While Freud established the central axes of the theory of perversion, Lacan elaborated on the subject s position in relation to the other, and his relationship with jouissance and desire. Lacan showed that the perverse puts himself in the place of the object a, offering himself as an intrument of the Other s jouissance. His symptomatic performance has the objective of dividing subjectively the other, to whom he tranfers his castration anxiety. The main focus of this work is the perversion s perspective as a discourse and not as a structure. In the Freudian s scheme, disavowal and repression does not exclude each other, and this indicates that the perverse dynamics includes a neurotic face. Thus, the ideas that the other does not exist to the perverse, that he does not suffer from anxiety, and that he is not acessible to analysis, can be argued. Finally, the form by which the transferencial field is often structured will be examined aiming to point out some aspects relative to the direction of the treatment.