PROBLEM TO BE SOLVED: To provide an underpants-type absorbent article having a soft exterior body, excellent in deformability of a shape along an article vertical direction, and deformability in a thickness direction, allowing a wearer to easily move, and excellent in touch and feeling of wear.SOLUTION: An underpants-type absorbent article 1 includes an exterior body 2, and an absorbent body fastened to the exterior body. The exterior body 2 includes an expansion/contraction part having an outer layer sheet arranged at a far side from the skin of a wearer, an inner layer sheet arranged at a closer side of the skin of the wearer than the outer layer sheet, and a plurality of elastic members 24 arranged therebetween. In the expansion/contraction part, the outer layer sheet and the inner layer sheet are joined with each other in a junction 26 arranged so as to form a plurality of junction rows 26S along an article vertical direction X, the plurality of elastic members 24 are arranged in an article cross direction Y so as to pass through between the junctions 26 adjacent to each other in the article vertical direction X, and the junctions 26 each comprise a pair of fusion parts u and d arranged in the article vertical direction X so as to be spaced from each other at an interval m.COPYRIGHT: (C)2015,JPO&INPIT【課題】外装体が柔軟で、物品縦方向に沿う形状の変形性及び厚み方向の変形性に優れ、着用者が動き易く肌触りにも優れており、履き心地に優れるパンツ型吸収性物品の提供。【解決手段】本発明のパンツ型吸収性物品1は、外装体2と、該外装体に固定されている吸収性本体とを具備する。外装体2は、着用者の肌から遠い側に配される外層シートと、外層シートよりも着用者の肌に近い側に配される内層シートと、その間に配された複数本の弾性部材24とを有する伸縮部を備え、該伸縮部においては、外層シートと内層シートとの間が、物品縦方向Xに沿う接合部列26Sが複数列形成されるように配置された接合部26において接合され、複数本の弾性部材24が、それぞれ、物品縦方向Xに隣り合う接合部26どうしの間を通って物品横方向Yに配設されており、接合部26それぞれが、相互間に隙間mを開けて物品縦方向Xに並んだ一対の融着部u,dからなる。【選択図】図3
