This thesis seeks to investigate the way psychoanalysis creates or builds new knowledge around the mental life. Therefore, the research goal is also to evaluate the development process of these procedures based on Freud s investigations, just like its application, focusing in the relationship between the procedures and Freud s theory over the mental processes. Moreover, the changes occured in the procedures are assessed by post-freud famous analysts and their clinical contribution, such as Ferenczi, Winnicott, Melanie Klein, Anna Freud e Lacan. Secondarily, we try to relate both technical and theoretical practices in psychoanalysis from authors arisen from philosophy such as Bruno Latour e Isabelle Stengers, using concepts of hybrids, circular reference and the Actor-Network Theory in establishing the connection between technique and theory, in this new science started up by Freud.