PROBLEM TO BE SOLVED: To provide a pants-type disposable diaper capable of effectively preventing leakage of urine or loose feces and preventing misplacing while not impairing the appearance of the diaper. A diaper (1) has a first stretchable region (40) and a second stretchable region (45) having a stretchable stress larger than that of the first stretchable region (40) at least on the ventral side portion (A). The outer layer sheet 30 of the outer package 3 has an outer layer folding portion 32 that is folded back to the skin facing surface side. The outer layer folded-back portion 32b of the back side portion B has an end portion on the crotch portion C side joined to the skin-facing surface of the absorbent main body 2. The outer layer folded-back portion 32a in the abdominal portion A is a member that is joined to a member facing the joined portion 50 and the crotch portion C side of the joined portion 50 and that faces the outer layer folded-back portion 32. It has a non-bonded portion 53 which is not bonded to. The end portion of the joint portion 60 on the crotch portion C side is located in the first stretchable region 40. [Selection diagram] Fig. 4【課題】尿や軟便の漏れを効果的に防止すると共に、おむつの外観を損なうことなく履き間違えを防止することができるパンツ型使い捨ておむつを提供すること。【解決手段】おむつ１は、少なくとも腹側部Ａに、第１伸縮領域４０と、該第１伸縮領域４０よりも伸縮応力が大きい第２伸縮領域４５とを有している。外装体３における外層シート３０は、肌対向面側に折り返された外層折り返し部３２を有している。背側部Ｂにおける外層折り返し部３２ｂは、その股下部Ｃ側の端部が、吸収性本体２の肌対向面上に接合されている。腹側部Ａにおける外層折り返し部３２ａは、これと相対向する部材に接合された接合部５０と、該接合部５０よりも股下部Ｃ側に位置し、該外層折り返し部３２と相対向する部材に接合されていない非接合部５３とを有している。接合部６０の股下部Ｃ側の端部は、第１伸縮領域４０に位置している。【選択図】図４
