The philosophical relationship between Husserl and Sartre can be traced back not only as a teacher-disciple, but also as a disciple trying to outdo his teacher. This article is an effort to show the direct relationship between Sartre’s reading of Husserl, noting to what extent the French philosopher understands the project of the father of phenomenology, and the way in which this reading allows Sartre to elaborate an authentic thought existentialist. With this we highlight the presumed debt of Sartrean existentialism regarding the Husserlian phenomenology.