The concept of cause developed in Lacan's Seminar On Anguish is examined in the context of the landmark contribution to the philosophical discussion on causality that is brought by Kant and argued by Lacan. We investigate the ontological dimension of causality that Lacan relates to the Freudian notion of Unconscious. In this direction, the article aims at the structure of the object "petit a", cause of the desire, as it derives from the elements of the drive, to show the importance of Lacan's formulations of the cause and to indicate that this process touches and transforms not only the field of the subject but the concept of cause itself.
Cause; Real; Subject; Object "petit a"