Abstract: An orthopedic device comprises a shaft capable of at least partially encircling at least a lower part of a leg, a foot part, a cup-shaped heel part connecting the foot part to the shaft, a continuous bearing surface arranged between the front end of the foot part and the heel part, the bearing surface constituting a lower closure of the orthopedic device and having a side facing the interior of the orthopedic device, which is flat and symmetrical with respect to a central longitudinal axis, and an arch support affixable to said bearing surface side. A portion of the arch support running along an outside of a foot capable of being supported by the arch support extends substantially horizontally, and a portion of the arch support running along an inside of the foot has a shape of a rising arc, a flank of the arc near the heel rising substantially perpendicularly from the bearing surface to an apex and extending from the apex to the foot part.