This article presents Heidegger's characterization of metaphysics as ontotheology. At first, the position of Heidegger's thought is presented by way of the question of the unconcealment, the ontological difference and the analysis of the forgetfulness of Being as the origin of metaphysics. The metaphysical vigor is characterized as a search for grounding being as being and as a whole, as principle of reason. At last, the article aims at reflecting on Heidegger's analysis of this movement as history of metaphysics, present nowadays as calculation and search for infinite control of the whole of being.