Being the supporter of the foot, in addition to covering the portion of the inside surface of leg section L of the upper part compared to portion and ankle Ak of ankle Ak, plate below covers the portion of the inside surface of foot F of the lower part compared to portion and ankle Ak of 32 and ankle Ak, plate it has with the hinge 4 which allows the fact that the aforementioned plate 32 and 34 turns relatively at the time of crookedness operation of 34 and the foot, plate 34 under the description above plate is arranged with 32 with respect to the description above and foot, F extends to the lower part the aforementioned hinge 4 compared to at least at the time of bottom bending/discouraging of the footPutting, the reinforcement section 32b which is piled up with the portion of plate 34 under the description above is formed by the plate 32 with respect to the description above, piles up by the fact that reinforcement section 32b of plate 32 with respect to the description above and portion of plate 34 under the description above are piled up at the time of the aforementioned bottom bending/discouraging mutually and the drag for the inside counter at the time of the aforementioned bottom bending/discouraging due to the fact that the beam is constituted, is larger than the drag for the inside counter at the time of back bending/discouraging of the foot.足のサポータであって、踝Akの一部および踝Akよりも上方の脚部Lの内側面の一部を覆う上プレート32と、踝Akの一部および踝Akよりも下方の足部Fの内側面の一部を覆う下プレート34と、足の屈曲動作時に前記プレート32、34が相対的に回転するのを許容するヒンジ4とを備え、前記下プレート34は前記上プレート32と足部Fとの間に配置され、前記ヒンジ4よりも下方に突出し少なくとも足の底屈時において前記下プレート34の一部と重なる補強部32bが前記上プレート32に形成され、前記上プレート32の補強部32bと前記下プレート34の一部とが前記底屈時に互いに重なることで重ね梁が構成されることにより、前記底屈時の内反に対する抗力が、足の背屈時の内反に対する抗力よりも大きい。
