The fastening tape included in the disposable diaper has a base sheet, and a hook sheet provided with a plurality of engagement hooks and fixed on the base sheet. The engagement strength of the fastening tape is 0.3 N/30 mm or more, and 1.5 N/30 mm or less. The bending rigidity value in the direction in which the surface of the base sheet of the fastening tape comes close is smaller than the bending rigidity value in the direction in which the surface of the hook sheet of the fastening tape comes close.