The aim of this article is to discusse the Martin Haideger's thought, its origins and applications in political thoughts. Some Iranian Religious Intellectuals have been influnced by Haiderger in criticizing concepts such as Democracy, Modernsation and the Western Philosophy. He belongs to the period of post modernism. The most critical feature for Hedger is to contervese Dekart concept of "Thinking- Being". Heidger puts the concept of Dazien- Thinking instead of thinking- Being. There has been a large challenges between pro- Poppers and pro- Heideger in Iran in an epoch- making period of 1365- to - 1380. This period in known as era of Iran religious Intellectualls.