Facing psychoanalysis,Beckett’s position among other modernist authors is quite exceptional:not only did he undergo a psychoanalytic treatment for two years while living in London,but also his works are replete with references to psychoanalysis,to the point that a psychoanalyst like Didier Anzieu could say that his texts are a vast continuation of psychoanalysis by the means of writing.After having retraced what we can learn from Beckett’s letters about his cure,I will focus on the impact his psychoanalyst,W.R.Bion,kept having on him.I will also stress how an earlier encounter with Freud(about Descartes) had paved the way for such a deep immersion,and then follow the aftermath of the cure in a few later texts.Finally,it is Beckett’s entire philosophy that can appear as testifying to his struggle with the Freudian Unconscious.