To provide an orifice muscle training device capable of maintaining, recovering or strengthening the orifice muscle while promoting a closing operation. An orifice muscle training apparatus includes a chin cup corresponding to a chin support member mounted on a chin of a user, and an opening load applying unit (an opening load spring 22a) for applying a load to movement of the chin cup accompanying the opening operation of the user. , 22b and the second slide portion 27b), and a closing drive unit (SMA springs 21a, 21b, a fan and an SMA power supply) for moving the chin cup in the closing direction in response to the closing operation of the user. [Selection diagram] FIG.【課題】閉口動作を促しつつ開口筋の維持、回復又は強化を図ることができる開口筋訓練装置を提供する。【解決手段】開口筋訓練装置は、ユーザーの顎に装着される顎支持部材に相当するチンカップと、ユーザーの開口動作に伴うチンカップの移動に対して負荷を加える開口負荷付与部（開口負荷ばね２２ａ，２２ｂ及び第２スライド部２７ｂ）と、ユーザーの閉口動作に伴ってチンカップを閉口方向に移動させる閉口駆動部（ＳＭＡばね２１ａ，２１ｂ、ファン及びＳＭＡ電源）と、を備える。【選択図】図２
