The Leibnizian conception of being is based on the notion of corporeal substance. It begins from the idea according to which every being consists in the organic body and the dominant monad, both which are linked in an infinitum relationship. The paper explains how Leibniz establishes that relationship. This explanation will be useful to defend that this type of link creates infinite, complete and indivisible units that allow life. From this defense, it points out two issues. On the one hand, that every corporeal substance arises in the moment of creation and that its organic development puts a display of transformations, which are establish in its original composition. On the other hand, that we can understand the living being as a plural indi vidual, whose composition has infinite bodily substances which give it its indivisible unit.