This study does not aim to hold within the whole Heideggerian thinking, but an attempt to understand, what he speaks. For the master’s level students, this study may serve as a good introduction to the vast depth of Heidegger’s thinking. It deals mainly with Heidegger’s understandings of human being, that Dasein is essentially characterized in terms of Being-in-the-world, ‘Da’ (this /that) of Being, that the human being becomes the inevitable access to the question of Being.