PROBLEM TO BE SOLVED: To prevent fracture along the vicinity of a proximal end of a fastening tape when the fastening tape is strongly pulled.SOLUTION: Either side of the diaper on the back side includes a gather sheet 62 on the inner side of a tape attaching portion 13C in the fastening tape 13 and in the periphery, and an exterior sheet 12 on the outer side of the tape attaching portion 13C and in the periphery. The tape attaching portion 13C is held between the gather sheet 62 and the exterior sheet 12, and bonded to the gather sheet 62 and the exterior sheet 12. A part of the exterior sheet 12 which overlaps with at least part of the tape attaching portion 13C is formed as a laminated reinforced portion 90 turned back in the width direction and bonded.
