The present invention aims to provide a pull-on diaper improved so that each of transversely opposite edges of the diaper can be ruptured with one hand for disposal after the diaper has been used. A pull-on diaper includes a front waist region and a rear waist region joined together along joints defined by transversely opposite edges of these waist regions so as to form a waist-hole and a pair of leg-holes. The joints are adapted to be ruptured for disposal of the diaper which has been used. The front waist region and the rear waist region are joined together along the joints by means of joining members and each of the joining members is provided with a gripper formed integrally with this joining member and rupture guides extending from the gripper toward the waist-hole and the associated one of the leg-holes.