PROBLEM TO BE SOLVED: To provide an underpant-type disposable diaper allowing a person wearing the diaper to easily recognize a waist opening by himself/herself in the dark at night so that the person hardly wears the diaper in the wrong way with the back side mistaken for the front abdominal side.SOLUTION: The underpant-type disposable diaper 1A has a waist elastic member 41 disposed in the waist opening WO, and is divided into an abdominal side part A, a back side part B and a crotch part C. The waist elastic member 41a in the abdominal side part A contains a phosphorescent agent so that the waist elastic member 41a is visible from the inner side of the waist opening WO in the dark.COPYRIGHT: (C)2013,JPO&INPIT【課題】おむつを装着する者が、夜間の暗所において、自力でおむつのウエスト開口部を認識し易く、おむつの背側部と腹側部とを履き違えて装着し難いパンツ型使い捨ておむつを提供すること。【解決手段】本発明のパンツ型使い捨ておむつ1Aは、ウエスト開口部WOにウエスト弾性部材41が配され、腹側部A、背側部B及び股下部Cに区分されている。腹側部Aのウエスト弾性部材41aは、暗所において、ウエスト開口部WOの内側からウエスト弾性部材41aが見えるように、蓄光剤を含有している。【選択図】図1
