Disclosed herein is an amnion insertion device used in urgent cervical cerclage in which an expansion balloon is inflated by fluid pressurized by an air injection tube integrally combined with the inside of an external pipe and a through hole so as to push the bulging amnion into the uterine lumen without damage and then to stitch the cervix to complete treatment of cervical incompetence, the expansion balloon provided at the front portion of the air injection tube is not deformed and is not pushed backward during the process of pushing the bulging amnion into the uterine lumen so as to easily perform cervical cerclage, and the external pipe and the air injection tube are integrally provided so that an operator may operate the amnion insertion device while grasping the amnion insertion device with one hand and perform cervical cerclage with the other hand, thus maximizing efficiency of cervical cerclage.
