An absorber 40 of a disposable diaper 10 includes a first region 41 arranged at least partially in the crotch region a second region 42 arranged adjacent to the first region, at an outer side from the first region in the product longitudinal direction, and having a lower bending rigidity than that of the first region and a third region 43 arranged adjacent to the second region, at an outer side from the second region in the product longitudinal direction, and having a higher bending rigidity than that of the second region. A boundary between the first region and the second region is arranged in the narrow region. A boundary between the second region and the third region is arranged on the side of the crotch region from an end 95R, on the crotch region side, of the waistline retaining unit in the front waistline region. An end, on the front waistline region side, of the third region is arranged on the side of the front waistline region from the end, on the crotch region side, of the waistline retaining unit in the front waistline region.【課題】腹側に配置される吸収体の幅方向における変形を抑制し、体液の漏れやフィット性の低下を抑制できる使い捨ておむつを提供する。【解決手段】使い捨ておむつ10の吸収体40は、少なくとも一部が股下域に配置された第1領域41と、第1領域よりも前胴回り域側において配置され、第1領域よりも曲げ剛性が低い第2領域42と、第2領域よりも前胴回り域側に配置され、第2領域よりも曲げ剛性が高い第3領域43と、を備える。第1領域の第2領域との境界は、括れ領域内に配置されており、第2領域と第3領域との境界は、ターゲット部95の股下域側の端部95Rよりも股下域側に配置され、第3領域の前胴回り域側の端部43Rは、ターゲット部95の股下域側の端部よりも前胴回り域側に配置されている。【選択図】図1
