The applicator for inserting a pessary into the uterus, which pessary comprises a chain combined with a distal coil screwable into the base of the uterus. The applicator has an inner shaft, which received the chain in its leading end, installed in an outer shaft and with its leading end securing the nearer of the coil in a formlocked or forcelocked manner, as well as a handle at the opposite end of the shaft whose rotation and axial displacement allow screwing the coil out of the outer shaft and into the base of the uterus to the extend of its longitudinal dimension. The outer and inner shafts are withdrawable from the uterus with respect to the screwed-in coil and chain which are to be released, after completion of the application. 7