PROBLEM TO BE SOLVED: To provide an orthodontic appliance in which a palate attachment portion does not fall off even when a force is received from various directions. SOLUTION: The orthodontic appliance 1 is detachably fixed to the upper jaw in the oral cavity, and is composed of a palate attachment portion 2 fixed to a protrusion provided on the upper jaw and a superelastic alloy, and the palate. The palate attachment portion 2 includes an arm portion 3 extending from the attachment portion 2 and having an end portion fixed to the tooth, and the palate attachment portion 2 protrudes toward the pharynx and is attached to the protrusion. It has a hook 2b to be fixed. [Selection diagram] Fig. 3【課題】口蓋取付部が様々な方向から力を受けても脱落しない歯列矯正器具を提供する。【解決手段】口腔内の上顎に着脱可能に固定される歯列矯正器具１であって、前記上顎に設けられた突起に固定される口蓋取付部２と、超弾性合金により構成され、前記口蓋取付部２から延在すると共に端部が歯に固定されるアーム部３とを備え、前記口蓋取付部２は、前記突起を挟持するクリップ２ａと、咽頭方向に向けて突出すると共に前記突起に固定されるフック２ｂとを有する。【選択図】図３
