PROBLEM TO BE SOLVED: To mend such a problem that elastic stretchable members are easily pulled out in extension areas of a front-piece outer wrapper body and a back-piece outer wrapper body.SOLUTION: A disposable diaper 100 includes a front piece 1, a back piece 2, and a crotch area 3a. The front piece 1 and back piece 2 include body areas 11 and 21 having side seal parts 4 formed at both width-directional end portions, and extension areas 12 and 22 that extend from the body areas 11 and 21 towards the direction of the crotch area 3a and the extension-width-directional width of which are gradually narrowed towards the direction of the crotch area 3a. The body areas 11 and 21 are disposed with one or a plurality of first stretchable members 13 and 23 in a stretched state along the width direction. The extension areas 12 and 22 are disposed with one or a plurality of second stretchable members 14 and 24 in a stretched state along the width direction. The second stretchable members 14 and 24 have oil solution adhesion amount of 0.1 wt.% or less.
