PROBLEM TO BE SOLVED: To provide an underpants type disposable diaper in which adhesion between an absorbent body and a wearers body is improved.SOLUTION: At least either a front body section 1 or a back body section 2 is provided with a plurality of first elastic members 71 and a plurality of second elastic members 72 extending in a width direction. The first elastic members and the second elastic members have left and right inclined parts which are extended inclined in the width direction in, for example, areas 70a, 70b that overlap width direction outer edges of an absorbent body 30. By the first elastic members, the second elastic members, and the inclined parts crossing, network regions 73 are formed on the left and right in the width direction. At least a part of the absorbent body overlaps the left and right network regions 73 respectively.COPYRIGHT: (C)2015,JPO&INPIT【課題】吸収性本体と着用者の身体の密着性を高めるパンツ型使い捨ておむつを提供する。【解決手段】前身頃1と後身頃2の少なくともいずれか一方に,幅方向に延びる複数の第1伸縮部材71と複数の第2伸縮部材72が設けられている。第1伸縮部材と第2伸縮部材は,例えば吸収性本体30の幅方向外縁と重なる領域70a,70bに,幅方向に対して斜めに傾斜して延びる左右の傾斜部分を有している。第1伸縮部材と第2伸縮部材と傾斜部分が交差することにより,幅方向の左右に網目状領域73が形成される。そして,左右の網目状領域73には,それぞれ,吸収性本体の少なくとも一部が重畳している。【選択図】図2