This invention discloses a tooth brace with a light guide function. The tooth brace comprises a tooth brace body and light guide strips, wherein the tooth brace body has light transparency and is provided with a tooth slot with dental arch curve； the light guide strips are penetrated into the tooth brace body along the tooth slot and are respectively located at opposite sides of the tooth slot； and the peripheral surfaces of the light guide strips have light transparency. The tooth slot can be directly used for sleeving teeth of a patient due to the dental arch curve formed therewith, and the light guide strips emit light and irradiate the oral cavity of the patient through the tooth brace body when being irradiated by infrared rays or far-infrared rays of a light emitting element.一種具有導光功用的牙套，包含有牙套本體與導光條，牙套本體具有透光性並形成具有牙弓弧度的牙槽，導光條沿著牙槽而穿設於該牙套本體，並分別位於牙槽的相對兩側，所述導光條的外周面具有透光性；因為牙槽形成牙弓弧度，而可直接用以套設於患者的牙齒，當發光元件以紅外線或遠紅外線照射導光條，導光條發光而透過牙套本體照射患者的口腔。
