In this propaedeutic work, through Kant’s own texts, I will try to offer a balanced description and a succinct reconstruction of Kant’s arguments about the possibility and impossibility of Metaphysics. In the first place I will present some criticisms of Metaphysics, then I will visualize the Kantian notion of Metaphysics, as well as its constitutive reasons and moments; and finally, I will analyze what kind of knowledge is Metaphysics and the characteristics and nature of it, so that this «science» is viable. In order to carry out this task, I will assume the hypothesis that Kant’s Metaphysics, in correspondence with the resolution of the third question of knowledge, is a science that integrates practical and theoretical reason into a univ...