The article deals with the problem of relation between metaphysical and onto-hermeneutical understanding of being in fundamental ontology of Martin Heidegger. The author demonstrates that critical investigation of metaphysical theses about being constitutes the main problems of fundamental ontology. The result of Heideggers investigation was a new form of posing a question about relation between being and truth in the context of explication of ontological problematic of presence (Dasein).
