The utility model provides a salivary duct is inhaled in towed oral cavity, its characterized in that: including a circular -arc body, its head is the end that absorbs water, and the afterbody is equipped with a delivery port for going out the water end (W. E. ), the end that absorbs water is equipped with the afterbody setting of a hook -like suction head, the circular -arc body of its hook section orientation, seted up absorption water hole on the hook -like suction head, absorption water hole sets up in the tip of hook -like suction head, and the afterbody direction of the circular -arc body of orientation is seted up, still include a circular -arc tractive handle, the one end of handle is connected in the middle part of circular -arc body, and the other end is connected in the afterbody of circular -arc body, forms a palm between circular -arc tractive handle and the circular -arc body and wears to establish the portion. The utility model discloses hook -like suction head stimulates patient's lower jaw downwards with circular -arc tractive handle cooperation, the hook -like suction head of accessible, makes comfortable the relaxing of chin muscle. Consequently, the patient neednot wear mouth gag and just enable the oral cavity and open and keep the longer time, pulls and stretchs chin muscle and also help patient to reduce fear and anxiety to reduce painfully.