PROBLEM TO BE SOLVED: To provide an orthodontic appliance for preventing a flat foot or a disturbance of standing balance which is likely to occur in a modern person wearing shoes or high heels and obtaining a healthy foot function. SOLUTION: The foot correction tool 1 of the present invention is used by inserting it into an insole of footwear or footwear, and a first protruding portion 5 protruding so as to press the ball of the big toe, and a small toe. It has the 2nd protrusion part 7 which protruded so that a sphere may be pressed, and the base part 3 in which the 1st protrusion part 5 and the 2nd protrusion part 7 were arrange positioned, and the base part 3 is the 1st. Toe side region W in which the protruding part 5 and the second protruding part 7 are arranged, the heel side region part X, and the boundary region part Y connecting the toe side region part W and the heel side region part X. And the toe side region W is formed thicker than the heel side region X, and the boundary region Y absorbs the difference in thickness between the toe side region W and the heel side region X. It consists of a stepped portion for. [Selection diagram] Figure 2【課題】靴やハイヒールを履く現代人に生じやすい偏平足や立位バランスの乱れを予防して健康な足機能を得るための足用矯正具を提供する。【解決手段】本発明の足用矯正具１は、履物の中底又は履物に挿入して使用するものであり、母趾球を押圧するように突出した第１の突出部５と、小趾球を押圧するように突出した第２の突出部７と、第１の突出部５と第２の突出部７とが配設されたベース部３とを有し、ベース部３は、第１の突出部５と第２の突出部７とが配設されたつま先側領域部Ｗと、踵側領域部Ｘと、つま先側領域部Ｗと踵側領域部Ｘとを接続する境界領域部Ｙとが設けられており、つま先側領域部Ｗは踵側領域部Ｘよりも厚く形成されており、境界領域部Ｙはつま先側領域部Ｗと踵側領域部Ｘとの厚みの差を吸収するための段差部からなる。【選択図】図２
