PROBLEM TO BE SOLVED: To provide a disposable diaper which, by improving flexibility of the upper edge of standing gathers, can prevent wearers skin from being hurt while keeping a leakage proof property.SOLUTION: A disposable diaper is based on the knowledge that a plate-like elastic expansible member 42, where a plurality of notches 421 are formed, joins to the upper edge of standing gathers 4, thereby improving flexibility of the upper edge of the standing gathers 4, and it is possible to move the upper edge of the standing gathers 4 flexibly according to unevenness and curvature of a wearers body.COPYRIGHT: (C)2015,JPO&INPIT【課題】立体ギャザーの上端縁における柔軟性を高めることで,着用者の肌が傷つくのを防止しつつ,防漏性を維持することができる使い捨ておむつを提供する。【解決手段】立体ギャザー4の上端縁に,複数の切込み421が形成された面状の弾性伸縮部材42を接合することにより,立体ギャザー4の上端縁における柔軟性が高め,かつ,着用者の身体の凹凸や湾曲に合せて立体ギャザー4の上端縁をしなやかに動かすことができるという知見に基づく。【選択図】図3