PROBLEM TO BE SOLVED: To provide a pad type disposable diaper which, despite of securing a substantial absorption amount, when being laid on an outer inner surface in use, is mountable in a hard-to-leak state.SOLUTION: The pad-type disposable diaper comprises: a pair of left/right inside easily-bendable parts 235 that are provided along width-directional both side edges of a main absorption part 230 respectively a pair of left/right outside easily-bendable parts 236 that are provided width-directionally outward the inside easily-bendable parts 235 at some intervals apart from each other and extend in the front/rear direction and side absorption parts 231 that are provided width-directionally outward the outside easily-bendable parts 236 and at width-directionally central sides with respect to the root part of inner three-dimensional gathers 224, and incorporate absorbers 223. Parts 232 between the inside easily-bendable parts 235 and the outside easily-bendable parts 236 are erected along with the outer three-dimensional gathers BS provided in the back side, by the bending of the inside easily-bendable parts 235, however, the side absorption parts 231 are not erected by the bending of the outside easily-bendable parts 236.COPYRIGHT: (C)2014,JPO&INPIT【課題】吸収量を多く確保できるものでありながら、アウター内面に敷いて使用するときに漏れ難い装着状態とすることができるパッドタイプ使い捨ておむつを提供する。【解決手段】主吸収部230の幅方向両側縁に沿ってそれぞれ設けられた、左右一対の内側易屈曲部235と、これら内側易屈曲部235の幅方向外側にそれぞれ間隔を空けて設けられた、前後方向に延在する左右一対の外側易屈曲部236と、これら外側易屈曲部236の幅方向外側であってかつインナー立体ギャザー224の付根部分よりも幅方向中央側に設けられた、吸収体223を内蔵するサイド吸収部231と、を備え、内側易屈曲部235と外側易屈曲部236との間の部分232が、内側易屈曲部235の屈曲により、裏側に位置するアウター立体ギャザーBSとともに起立し、サイド吸収部231は、外側易屈曲部236の屈曲により起立しないことにより解決される。【選択図】図4