To provide a foot sole fixing tool which can be easily worn at all times on the sole and can be easily worn.A foot sole fixture (11) to be fixedly supported by being worn on a wearers sole portion (10), characterized in that it comprises an inner side directed along the form of a longitudinal arch portion (13) on the inner side of the wearers sole The longitudinal arch support portion 14 and the outer longitudinal arch support portion 16 which is directed along the form of the longitudinal arch portion 15 outside the wearers sole are formed integrally with the sole of the wearer by thermoplastic resin Has been done.(FIG.【課題】足底に簡単に常時装着することができ、しかも装着性が良い足底固定具を提供する。【解決手段】着用者の足底部分10に装着されて、固定支持される足底固定具11であって、着用者の足底の内側の縦アーチ部分13の形態に沿って宛がわれる内側縦アーチ支持部14と、着用者の足底の外側の縦アーチ部分15の形態に沿って宛がわれる外側縦アーチ支持部16と、が熱可塑性樹脂により着用者の足底に倣って一体形成されている。【選択図】図1