To provide an underpants type absorbent article which shows an appearance and touch close to underpants of underwear.SOLUTION: An underpants type absorbent article of one embodiment of the invention includes an absorber, a waist part, and a crotch part. The absorber is located at the crotch. The waist part has an abdominal part and a back side part positioned at a waist. The crotch part is positioned between the abdominal part and the back side part and holds the absorber together with the abdominal part and the back side part. At least one of the abdominal part and the back side part is constituted of a stretchable sheet including a first region and a second region positioned on an upper side in a vertical direction that is perpendicular to a circumferential direction of the waist. The stretchable sheet is constituted by including an elastic resin and a non-woven sheet layer internally including the elastic resin and has a contraction stress in the circumferential direction that is different between the first region and the second region, and dimensions in the first region and the second region in the circumferential direction in a natural state are equal.SELECTED DRAWING: Figure 3【課題】下着のパンツに近い外観と触感を呈するパンツ型吸収性物品に関する。【解決手段】本発明の一形態に係るパンツ型吸収性物品は、吸収体と、ウエスト部と、股下部と、を有する。上記吸収体は、股下に位置する。上記ウエスト部は、胴回りに位置する腹側部及び背側部を有する。上記股下部は、上記腹側部と前記背側部との間に位置し、上記腹側部及び上記背側部とともに上記吸収体を保持する。上記腹側部及び上記背側部の少なくとも一方が、第１の領域と、上記第１の領域の、上記胴の周方向と直交する上下方向の上側に位置する第２の領域とを含む伸縮シートで構成される。上記伸縮シートは、弾性樹脂と上記弾性樹脂を内包する不織布層とを含んで構成され、上記第１の領域と上記第２の領域とで上記周方向の収縮応力が相互に異なり、上記第１の領域と上記第２の領域とで自然状態での上記周方向における寸法が等しい。【選択図】図３
