The absorbent body (40) of this disposable diaper (10) is provided with: a first region (41) of which at least a portion thereof is disposed at a crotch expansion/contraction section (200a) of a groin region； and a second region (42) that has a lower bending rigidity than the first region and is disposed adjacent to the first region to the outside in the product lengthwise direction of the first region. The boundary between the first region and the second region is disposed to the outside in the product lengthwise direction from the outer end of the crotch expansion/contraction section in the product lengthwise direction, and is disposed to the inside in the product lengthwise direction from the outer end of a leg expansion/contraction section in the product lengthwise direction.
