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