PROBLEM TO BE SOLVED: To provide a disposable diaper in which a joining part of both end parts in a waistline direction of each exterior part can be reliably broken.SOLUTION: An exterior body 12 includes an upper part region 12U and a lower part region 12D. The upper part region 12U includes an upper part elastic member 15U, and the lower part region 12D includes a lower part elastic member 15D. The upper part region 12U includes: an inner side elastic part 27 which is configured by sandwiching the upper part elastic member 15U by sheets and is positioned inside an absorbent body 16 and an outer side sheet part 26 which is positioned outside the absorbent body 16 to face the inner side elastic part 27. The lower part region 12D includes an outer side elastic part 28 that is configured by sandwiching the lower part elastic member 15D by the sheets and is positioned outside the absorbent body 16. The upper part region 12U and the lower part region 12D are overlapped with each other.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】各外装部の胴回り方向の両端部の接合部を確実に破ることを可能とした使い捨ておむつを提供する。【解決手段】外装体12は、上部領域12Uと下部領域12Dとを備え、上部領域12Uは、上部弾性部材15Uを備え、下部領域12Dは、下部弾性部材15Dを備え、上部領域12Uは、シートで上部弾性部材15Uを挟み込んで構成し、吸収性本体16より内側に位置する内側弾性部27と、吸収性本体16外側であって、内側弾性部27と対向して位置する外側シート部26とを備え、下部領域12Dは、シートで下部弾性部材15Dを挟み込んで構成され、吸収性本体16より外側に位置する外側弾性部28を備え、上部領域12Uと下部領域12Dとが重なっている。【選択図】図2