Kant, in his precritical writing Von dem ersten Grunde des Unterschiedes der Gegenden im Raume (1768), makes a remarkable effort to show that the reality proper to the concept of space is related to the live body itself as a system of orientation that would correspond, to some way, to the Husserlian characterization of the Leib as absolute here. Indeed, it is possible to find in Kantian argumentation the idea that we can only distinguish the directions of space insofar as these are determined concerning the sides of our live body. In this work, I will present a phenomenological approximation or reading on this very brief dissertation emphasizing the “own reality” of space and its relationship with our corporality, in other words, between the complementarity of the living own body (Leib) with space.