PROBLEM TO BE SOLVED: To improve fitness around legs, especially fitness of an inguinal region when seated or walking, in an underpants type disposable diaper of an exterior package divided into two.SOLUTION: In an underpants type disposable diaper which is provided with a front side exterior body 12F and a rear side exterior body 12B separately, the front side exterior body 12F and the rear side exterior body 12B are separate in a back and forth direction LD in the middle of the back and forth direction LD, and an interior body 200 extends in the back and forth direction LD from the front side exterior body 12F to the rear side exterior body 12B and is bonded to the front side exterior body 12F and the rear side exterior body 12B, inner/outer bonded parts 201, 202 bonding the interior body 200 and the front side exterior body 12F are provided in the way that they are across both end parts in a width direction on the waist side, the width decreases stepwise or continuously as it approaches an edge on the crotch side of the front side exterior body 12F there are non-bonding parts 203 at both end parts in the width direction on the crotch side of the front side exterior body 12F where the interior body 200 and the front side exterior body 12F are not bonded.SELECTED DRAWING: Figure 9COPYRIGHT: (C)2018,JPO&INPIT
