In an underpants-type disposable diaper including a waist edge portion in which pleats extend straight and which has excellent fit, the inner layer (21) and the outer layer (22) at the waist edge portion (W) of an outer body (12) are joined by an adhesive (71) arranged intermittently or a welding process performed intermittently in the width direction and continuously in a direction crossing the width direction, thereby forming sheet joined sections (70), waist edge portion resilient and elastic members (17) are sandwiched between the inner layer (21) and the outer layer (22) and fixed to at least one of the inner layer (21) and the outer layer (22) at positions intersecting with the sheet joined sections (70), and the diaper includes an area (25) not being joined and not having resilient and elastic member at an end portion of the outer body (12) on the waist opening (WO) side in the waist edge portion (W), the area not having sheet joined sections (70) nor the waist edge portion resilient and elastic members (17), and a vertical range being wider than spacing between the waist edge portion resilient and elastic member (17) positioned closest to the waist opening (WO) side, and the waist edge portion resilient and elastic member (17) adjacent thereto.
