Heidegger's Ambiguous Transformation of Husserl's Phenomenology

The aim of this paper is to examine, first of all, the way in which Heidegger develops, in some of his Marburg lecture courses, a critique to the Husserlian idea of phenomenology and elaborates, at the same time, his own philosophy, in the guise of a hermeneutic ontology. I will then analyze a number of passages from Sein und Zeit where Husserl is, implicitly or explicitly, referred to. In the conclusion I will attempt to throw light on the ambiguity inherent in the notion of “phenomenology”, as formulated by Heidegger, and in the relation he establishes between phenomenology and ontology. This ambiguity is worth examining in depth if we wish to assess his departure from Husserl’s thought and the effective overcoming, in ontological terms, of Husserl’s phenomenological perspective.