Objective: This article aims to shed light on the psychoanalysis theory from an epistemological view, especially regarding two ideas, the first one is about the causality the second is about the determinism. For Freud this inevitable conception or orientation had its substantive contexts in the early 20th century. So our contribution is essentially accountability and questioned the scientific extent specifically; how the analytic psychology could put his theory in the category of the true sciences.
This article aims to address the principle of the causality in the psychoanalysis theory where we will try to know how Freud consider all acts behaviors of the Self are inevitable and not issued arbitrarily. So how does Freud justify this inevitable perception when he calls for the unconscious?
Keywords: Psychoanalysis, determinism, causality.