PROBLEM TO BE SOLVED: To provide a stretchable structure excellent in breathability and flexibility and allowing more neatly shaped pleats to be formed.SOLUTION: A stretchable structure for a disposable wearing article has elongated elastic members 19 arranged between an outer nonwoven fabric layer 12S and an inner nonwoven fabric layer 12H. The outer nonwoven fabric layer 12S is a porous 14 nonwoven fabric in which pores 14 extending therethrough in the thickness direction are arranged. Sheet joining parts 70 joining the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are formed in a striped pattern spaced in a perpendicular direction XD and substantially continued in a stretch direction ED. The pores 14 are arranged such that pore columns 91, 92 spaced in the perpendicular direction XD repeatedly alternate at predetermined central intervals in the stretch direction. In the first pore columns 91, the diameters of the pores 14 gradually become smaller from one end toward the other of the thickness direction. In the second pore columns 92, the diameters of the pores 14 become gradually smaller from the other end toward the one end of the thickness direction.SELECTED DRAWING: Figure 11COPYRIGHT: (C)2020,JPO&INPIT【課題】通気性及び柔軟性に優れ、より整った襞が形成される伸縮構造を提供する。【解決手段】外側不織布層１２Ｓ及び内側不織布層１２Ｈの間に細長状の弾性部材１９が配置され、外側不織布層１２Ｓは、厚み方向に貫通する孔１４が配列された有孔１４不織布であり、外側不織布層１２Ｓ及び内側不織布層１２Ｈを接合するシート接合部７０は、直交方向ＸＤに間隔を空けて、かつ伸縮方向ＥＤに実質的に連続する縞状パターンで形成され、伸縮構造における孔１４の配列は、直交方向ＸＤに間隔を空けて並ぶ孔１４の列９１，９２が伸縮方向ＥＤに間隔を空けて並ぶとともに、孔１４の径が厚み方向の一方から他方に向かうにつれて小さくなっている第１の孔列９１と、孔１４の径が厚み方向の一方から他方に向かうにつれて小さくなっている第２の孔列９２とが、伸縮方向ＥＤに所定の中心間隔で交互に繰り返すものである、使い捨て着用物品の伸縮構造である。【選択図】図１１
