Abstract

The aim of this study is to work out the meaning of the phenomenon being-in-the-world, out of the concepto f World, released by Heidegger in his analytic of Dasein’s Being. If Dasein is the only one who has the understanding of Being under the structure: Being projective already in a World with the intramundane found being, then this analytic is the primary necessary step for the understanding of the question that asks about the meaning of Being at all, which is the question posed in the beginning of the treatise Being and Time. This study is then proposing to explain, briefly, the ontology of Dasein as World, formed in the first section of Being and Time, which can provide Dasein, a first appropriating of its own structure of possibility.