An oral muscle strength training device is provided with a mouthpiece body customized according to the shape of the wearer's teeth, and a U-shaped upper insertion groove and a U-shaped and opening are formed on the upper and lower sides of the mouthpiece body respectively A downwardly embedded groove, the upper embedded groove includes a plurality of sequentially connected upper tooth grooves, the lower embedded groove includes a plurality of sequentially connected lower tooth grooves, a plurality of upper tooth grooves and a shape of a plurality of lower tooth grooves It conforms to the shape of the wearer's teeth; when the wearer wears the new model, the upper and lower rows of teeth are embedded in the multiple upper tooth slots and the multiple lower tooth slots, so that the wearer's upper and lower teeth can Closely coordinated with the braces body, in addition to exercising the soft tissues and muscles in the mouth and practicing nasal breathing during the wearing process, it can also improve the problems of snoring and sleep breathing.一種口腔肌力訓練器,設有一依據配戴者牙齒形狀客製化的牙套本體,在該牙套本體的上側以及下側分別形成一U形且開口朝上的上嵌槽以及一U形且開口朝下的下嵌槽,該上嵌槽包括多個依序相連的上齒槽,該下嵌槽包括多個依序相連的下齒槽,多個上齒槽以及多個下齒槽的形狀與配戴者的牙齒形狀相符;當配戴者配戴本新型時,是將上、下排牙齒嵌入多個上齒槽與多個下齒槽,使得配戴者的上、下排牙齒能與牙套本體緊密配合,除了能在配戴過程中以咬合的動作鍛鍊口內軟組織、肌肉並練習鼻呼吸以外,還能改善打鼾與睡眠呼吸中止的問題。