PROBLEM TO BE SOLVED: To correct an O-leg for indoor use provided with a stopper function for preventing both feet of a person to be corrected from slipping inward during walking, and a flat surface holding function for preventing the bottom surface after the correction appliance is worn from being rounded. Provide brace. SOLUTION: A device body 1 having a shape in which a bottom member 10 formed in an inclined shape gradually lowering from an outer end portion toward an inner end portion is fixed to a separate substrate 20 is attached via a locking means. A pair of left and right indoor O-leg straightening devices that are attached to the sole of the foot, wherein the base plate 20 is formed substantially the same as the bottom shape of the bottom member 10； It is set as the structure provided with the standing part 22 which rises gently along an inner surface. [Selection] Figure 1【課題】 歩行時における矯正対象者の両足が内側へ滑り出ることを防止するストッパー機能と、矯正装具を装着後の底面が丸くなるのを防止する平面保持機能が付与された室内用Ｏ脚矯正装具を提供する。【解決手段】 外側端部から内側端部に向けて徐々に低くなる傾斜状に形成された底部材１０を、別体の基板２０に固着した形状の装具本体１を、係止手段を介して足裏に装着するようにした左右一組の室内用Ｏ脚矯正装具であって、前記基板２０が、前記底部材１０の底面形状と略同一に形成された底部材支持部２１と、足の内側面に沿って緩やかに立ち上がる立設部２２を備えた構成とする。【選択図】図１
