In this volume the lectures presented during the last session of Coloquo "Heidegger, Ouvertes Questions" organized in Paris on 12, 13 and 14 March 1987 by the College International de Philosophie meet. The term "Questions Ouvertes" indicated, as publishers Cahier said, will not close the debate "which recently emerged following the publication of the work of Mr. Victor Farias: Heidegger and Nazism". In reality, these "Questions Ouvertes" those questions, problems or open issues beyond the narrow framework of timely consideration, calling into question that leads us beyond Heidegger, Nazism beyond it. In his opening we interrogate ourselves from its timelessness.