This disposable diaper (1) is provided with a composite elastic member (5) in a waistband portion (WP). The composite elastic member comprises a first non-woven fabric sheet portion (6U) and a second non-woven fabric sheet portion (6L) that are superimposed over each other and a plurality of elastic members (7) that extend along the waistband direction (DW) between the non-woven fabric sheet portions. The first and second non-woven fabric sheet portions each have a plurality of concave-convex areas (41) and at least one non-concave-convex area (43) that separates the concave-convex areas from each other in a direction that is orthogonal to the waistband direction. The waistband portion includes a waistband opening side area (AWO) that is located on the waistband opening side and a leg opening side area (ALO) that is located more toward the leg opening (LO) sides than the waistband opening side area. The spacing between elastic members (LL) disposed in the leg opening side area is larger than the spacing between elastic members (LW) disposed in the waistband opening side area.
