PROBLEM TO BE SOLVED: To provide a disposable diaper for reliably preventing leakage of body fluid regardless of whether auxiliary pads are layered and whether the auxiliary pads are long or short, or the like.SOLUTION: In the disposable diaper, an interior body 10 having a liquid permeable surface sheet, a liquid impermeable reverse surface side sheet, and an absorber 13 in between the sheets and an exterior body 20 fixed on an outer surface and extended to the front and the back of the interior body 10 are provided from a front panel F to a back panel B, and pockets PA, PB opening toward a central side in the back and forth direction are provided for respective inner sides of the front panel F and the back panel B. The pockets PA, PB are provided so that opening positions are separate in the back and forth direction in the front panel F and the back panel B, and respective opening widths of the plurality of pockets PA, PB become wider according as they go away from the center in the back and forth direction.
