The main aim of this paper is to try to answer the question of the nature of Kantian project of the
transcendental philosophy. Is it, in real, as Kant by himself says, that his philosophy, as the critic
of the pure theoretical reason presupposes, is merely the preparation the ground under the
metaphysics, and merely asks the question of the possibility of metaphysics at all, or rather Kant's
system of the theoretical philosophy called by Kant as formal or transcendental idealism can be
classified as one of the main ontological systems: ontological realism or idealism, in the classical
sense. I think the crucial notion, which can help to solve this problem, is the notion of reality used
by Kant in several meanings and contexts which I am going to examine in this article.