The invention relates to a connecting pipe structure of a gas cutting pipe, in particular to a pipe connected between a gas cutting pipe and a respirator, the nozzle of the connecting pipe has an elastic film extending to the center of the circle, and is fixed on the outer pipe wall. The adhesive tape body is provided, and when the nozzle of the connecting tube is sleeved between the gas cutting tube and the respirator, the elastic film is pushed in and wrapped around the sleeve of the gas cutting tube and the respirator to provide a tight bundle The fixing force, and the front end of the adhesive tape body which is torn by the connecting tube can be simultaneously adhered to the sleeve to form a double fixing effect.本發明係一種氣切管之連接管結構，尤指一種連接於氣切管與呼吸器之間的管路，該連接管的管口具有向圓心延伸的彈性膜，並在外部管壁上固設有黏膠帶體，俾可令連接管的管口套接氣切管、呼吸器時，該彈性膜被內推而包覆束固在氣切管、呼吸器的套管外部，提供緊束之固定力，而且連接管撕開的黏膠帶體前端可以同步黏貼於套管處，形成雙重固定作用者。
