PROBLEM TO BE SOLVED: To provide an underpants type absorbent article in which compression feeling on a hypogastrium and falling from a rear side are fully suppressed.SOLUTION: An underpants type absorbent article 1 is provided. The underpants type absorbent article 1 is configured so that a dimension of an arc between side seal parts 303 in a front side waist region 13B when the absorbent article is worn by a wearer such that a bottom surface of a cylinder matches a position having a depth of 150 mm from a waist opening part 11 on the outside of a cylinder having a circumference of 800 mm, is larger than a dimension of an arc between side seal parts 303 in a rear side waist region 15B by 40 mm or greater, and a stretch stress in a width direction of the rear side waist region 15B at a time point when the rear side waist region 15B is extended in a width direction up to 2.0 times a dimension in the width direction of the rear side waist region 15B before extension, then, is returned to 1.5 times the dimension in the width direction of the rear side waist region 15B before extension, is 1.3 times or greater the stretch stress of the front side waist region 13B subjected to the same test in the same condition.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】下腹部の圧迫感及び後側からのずれ落ちが十分に抑制された、パンツ型吸収性物品を提供する。【解決手段】パンツ型吸収性物品１を、円周８００ｍｍの円筒の外側に、円筒の底面がウエスト開口部１１から深さ１５０ｍｍの位置と一致するように装着させた際の、前側腰回り領域１３Ｂのサイドシール部３０３間の円弧の寸法が、後側腰回り領域１５Ｂのサイドシール部３０３間の円弧の寸法よりも、４０ｍｍ以上大きく、後側腰回り領域１５Ｂを、伸長前の後側腰回り領域１５Ｂの幅方向の寸法の２．０倍まで幅方向に伸長させたあとに、伸長前の後側腰回り領域１５Ｂの幅方向の寸法の１．５倍となるまで戻した時点における、後側腰回り領域１５Ｂの幅方向の伸縮応力が、同様の条件で試験した際の前側腰回り領域１３Ｂの幅方向の伸縮応力に対して、１．３倍以上である、パンツ型吸収性物品１を提供する。【選択図】図１
