Foot prosthesis, comprising an upper part, and a lower part that is placed on the ground when walking, which parts extend one above the other and at a distance from each other, are connected to each other at the forefoot and the heel and, forming a spring, move relative to each other during walking, wherein the upper part (3) and the lower part (4) are formed by means of a one-piece, closed component (2) made from a carbon fiber composite.
