PROBLEM TO BE SOLVED: To improve fitness of a lower part of the buttocks part.SOLUTION: To an exterior body, elastically stretching elastic member is fixed. The elastic member has: a first elastic member 31 which goes along a left opening edge from left side edge part of a back body B, goes along a right opening edge from a right side edge part of the back body B, and whose center part in a width direction continues the center part in the width direction or is discontinuous a second elastic member 32 which goes from the left side edge part of the back body B to the right side of a front body F and a third elastic member 33 going from the right side edge part of the back body B to the left side of the front body F. The second elastic member 32 and the third elastic member 33 cross the first elastic member 31 respectively at a left and right positions away from an absorber of the back body B.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2019,JPO&INPIT【課題】臀部の下部のフィット性に優れるものとする。【解決手段】外装体に対して弾性的に伸縮する伸縮部材が固定されており、 前記伸縮部材は、後身頃Bの左方側縁部から左開口縁に沿い、かつ、後身頃Bの右方側縁部から右開口縁に沿い、幅方向中心部を連続する、あるいは幅方向中心部が不連続である第1伸縮部材31と、後身頃Bの左方側縁部から前身頃Fの右方側に向かう第2伸縮部材32と、後身頃Bの右方側縁部から前身頃Fの左方側に向かう第3伸縮部材33と、を有し、前記第2伸縮部材32及び第3伸縮部材33は、後身頃Bの前記吸収体から離隔した左方及び右方位置において、前記第1伸縮部材31とそれぞれ交差している。【選択図】図2