< Topic >It is possible, at the same time installs and to prevent the counter sprain inside the foot joint securely, it offers the support component inside the foot joint which can wear the normal shoes.SolutionsThe foot bottom belt 16 where it buckles lap in direction of the upper part tibia of the foot glenoid inner fruit section, pushing pressure while expanding in the pushing pressure fixed part 11 which is locked and outside fruit section storage section in the spur bony septum, the boat condition bony septum and presses the calcaneus the pressure section the crookedness destal 14 which it turns 13 where is connected in the lower part of 12 and the foot glenoid inner fruit section and foot cartridge head and, support structure of tabular one body which it has passes by the surface fastener and the foot cartridge head which lock 10 and support structure 10 in the neck bone section to the tibia and extends to the tibia and the said tibiaBeing coiled round, the other end in the surface fastener in order in anterior belt 17a and the other end of foot bottom belt 16 the aforementioned tibia which installation and removal possibly are installed holding to do from the back of the tarsus, being coiled round to the said tibia, it possesses with the back belt 17b which, is installed it features that the counter sprain inside the foot joint is suppressed.< Choice figure >Drawing 7【課題】足関節内反捻挫を確実に防止することができ、且つ装着しても通常の靴を履くことができる足関節内側支持部材を提供する。【解決手段】足関節内果部の上方脛骨部の周方向に湾曲し、脛骨部に押圧固定される押圧固定部11と、外側に膨らんだ内果部収容部12と、足関節内果部の下方に連なる距骨部、舟状骨部および、踵骨部を圧迫する圧迫部13と、足底部に回り込む屈曲端部14と、を備えた板状一体の支持本体10と、支持本体10を頸骨部に固定する面ファスナーと、足底部を通り脛骨部まで延びる足底ベルト16と、該脛骨部に巻き付いて他端部が面ファスナーに着脱可能に取り付けられる前側ベルト17aと、足首の後側から足底ベルト16の他端部を前記脛骨部とで挟持するように該脛骨部に巻き付いて取り付けられる後側ベルト17bとを有し、足関節内反捻挫を抑制することを特徴とする。【選択図】図7