After 1945 Arendt’s political thinking has developed further by embracing Jaspers and Heidegger. Arendt’s existential task was to bring to the fore that the political realm was being faded away, and to sound out about the possible condition of a world in which the political could take place. Heidegger in a point of view of forgetfulness of Being has fixed his task on the question of Being. Jaspers discovered the Communication by linking questions of a moral philosophy such as a guilty or a responsibility to questions. Before understanding this difference, We need to look at the point where Arendt’s interest in Jaspers and Heidegger begins to change. Because Arendt begins to pay attention to Heidegger’s criticism of the publicness of the “They” rather than to Jaspers’s Communication that was taking root in the private encounter. Of course, in “What is Existential Philosophy”(1946) Arendt seems to reject Heidegger’s existentialism as ever, but since the early 1950s, her remarks about Heidegger have become careful. In this respect, while checking the cause of the difference in their thought, I will examine how Arendt’s political thought originates from Heidegger, and how Arendt leaves Jaspers and appropriates Heidegger. From this, I will understand the political-philosophical criticisms of Heidegger, that is, even though Heidegger’s responsibility as a german intellectual exceeded the reflection on modernity he never tried to go over the framework of it.