Vozniak S. Martin Heidegger's fundamental ontology as a conceptual prerequisite for his understanding thought.

The object is Martin Heidegger's fundamental ontology. The aim is to exposure the Heidegger's understanding of thinking and its connections with his conception of fundamental ontology. The methods are a logical-analytical, and historical-hermeneutical analysis, phenomenological approach, category analysis. The author explored the basic sources and factors of the ontological turn in the philosophy of M. Heidegger, it's proved that existential Dasein analyst in the context of fundamental ontology defined the highlights of Heidegger's understanding of thinking. It's found out that Heidegger's understanding of thinking as the co-existence of materiality opens new possibilities for understanding human tasks of life, and for further definition of significant features of existential status of man and mankind and is flogging human materiality. Existential thinking as a being thinking opposed to common thinking as the representation and calculation; only enter in its context, situation and stress can step-by-step lead a man and mankind from the state of forgetting being. Heidegger's Concept of thinking leads to not only thinking about existential, but primarily to the existential. Application sphere is the training courses.