Problem to be solved: to provide an orthodontic device capable of effectively exerting a force toward the inside of the toe of the thumb of the foot protruding from the outside in the correction of the hallux valgus.Solution: the outer mounting body 3, which is configured to permit acceptance of the foot f from the toe FA side by elastic deformation, the inner portion 3F tightly adhered to the side of the thumb FC of the foot F, and the outer portion 3G which is tightly adhered to the side of the small finger FD of the foot F, is provided with the number of springs It has two or more long spring springs 4.Any one of two or more of the plate spring bodies 4 can be attached to the inner portion 3F in such a manner that the longitudinal surface of the plate spring body 4 is formed along the longitudinal direction X of the foot F and the one surface 3a of the plate spring 4 faces the side of the thumb FC of the foot F.Diagram【課題】外反母趾の矯正にあたり、外側に突き出した足の親指の付け根側に、より効果的に内側に向けた力を作用させることが可能な矯正具を提供する。【解決手段】つま先Ｆａ側からの足Ｆの受け入れを弾性変形によって許容するように構成された内側装着体２と、足Ｆの親指Ｆｃ側の側部に密着する内側部分３ｆと足Ｆの小指Ｆｄ側の側部に密着する外側部分３ｇとを備えてなる外側装着体３と、ばね条数を異ならせる二種以上の長尺の板バネ体４とを備える。二種以上の前記板バネ体４のいずれか一つを、前記内側部分３ｆに、足Ｆの前後方向ｘに前記板バネ体４の長さ方向を沿わせ、かつ、前記板バネ体４の一面３ａが足Ｆの親指Ｆｃ側の側部に向き合う態様で、取り替え自在に添装可能としてなる。【選択図】図２
