Abstract: An insole (10) for a shoe, having: a spring steel plate (50), which is stiff in the transverse direction of the sole, particularly in the ball region of the foot, vertically flexible in the longitudinal direction of the sole and retstores itself elastically after loading, wherein the spring steel place (50) has a transverse profile (55) substantially over the entire sole region running preferably normal to the longitudinal direction of the sole; and a plastic layer in which the spring steel plate (50) is arranged, wherein the plastic layer is a polyurethane gel layer (18) with a Shore hardness 00 of 45-70.