This essay attempts to show that there are three approaches to Logos in Heidegger`s Thought. (1)The existential approach of Being and Time (1927). (2)The ontological approach from 1935 to 1949, i. e., from An Introduction to Metaphysics to Letter on Humanism. (3)The hermeneutical approach from 1950 onward. In the conclusion of this essay, the relationship of these three approaches is analysed.