The demonstration of immortality of soul in Plato’s dialogues, notably in Phædo, has been the object of many commentaries : as a result, it has been for a long time the major reference about this question. So, this thesis’ purpose is accomplishing the « deconstruction » of Plato’s writings about soul’s survival : when he begins to know his own being, every human might have spontaneous intuitions which make he thinks his soul survive after body’s death. Maybe such intuitions underlie this concept in Plato’s dialogues : so, what does Plato, explicitly or not, tell about these intuitions ? Which human features underlie his eschatological myths ? In order to try to answer these questions, the actual commentary of Plato’s explanations concering ...