The present invention relates to a respiratory tract aperture expansion maintainer, mainly comprising a main body. Two sides of the main body are extended to respectively form an elastic sheet, and at the places where the elastic sheet is deviated from the end of the main body, a thickened protruding part is formed. An upper lip placing part and a lower lip placing part are respectively formed on the outer side of the main body, and an upper teeth placing part and a lower teeth placing part are respectively formed on the inner side of the main body. The lower teeth placing part is situated in front of the upper teeth placing part. According to the structure, the maintainer is put into the mouth of an unconscious person to let the upper and lower lips and upper teeth and lower teeth place on the upper lip placing part, lower lip placing part, upper teeth placing part, and lower teeth placing part respectively to change a tongue shape and a lower jaw position of the person for achieving the purpose of helping the person restore the breath by respiratory tract expansion.本發明為有關一種呼吸道口徑張開維持器,其主要包含一主體,於主體兩側處分別延伸形成一彈片,且於彈片背離主體端處皆形成一增加厚度之突出部,該主體外側處分別形成一上唇置放部及一下唇置放部,而該主體內側處分別形成一上牙齒置放部及一下牙齒置放部,該下牙齒置放部位於該上牙齒置放部之前方,藉由上述之結構,將維持器置入失去意識的人員口中,讓上下嘴唇及牙齒分別放於上唇置放部、下唇置放部、上牙齒置放部及下牙齒置放部,改變人員舌頭形態及下顎位置,以達到使用人員之呼吸道張開及幫助恢復呼吸之目的。1‧‧‧呼吸道維持器2‧‧‧主體3‧‧‧彈片5‧‧‧把手部6‧‧‧上唇置放部7‧‧‧下唇置放部10‧‧‧上立牆面15‧‧‧彈片折曲部20‧‧‧凹部24‧‧‧拉繩
