A contribution to the renewed German and French discussion about the important German philosopher of this century, Martin Heidegger, and about his relation to national socialism. To deal with the ideological and personal partake of the thinker in the activity of NSDAP is deserves our attention from the two points of view. First, Heidegger's attitude towards his own past after 1945 is typical for the spiritual position that continually shaped the history of the Federal Republic of Germany up to the (...) 60's. Second, each tradition, which made people blind to the nazi regime, is to be critically adopted. J. Habermas asks if there was an inner connection between Heidegger's philosophy and his political perception of the situation. He summarizes the views of O. Poggeler, W. Franzen, H. Ott, and he refers to other writings and newspaper articles as well. The author emphasizes that any moral evaluation of the behaviour and the acting during the nazi epoch is possible only when based on a historical approach. Heidegger's work, on the other hand, disconnected itself from his personality already long time ago, and especially the Being and Time is placed so eminently in the philosophical thought of our century, that it cannot be discredited at all by his engagement on the part of fascism. (shrink)