PROBLEM TO BE SOLVED: To provide a tape-type disposable diaper easily retaining a state of appropriately covering a body of a wearer.SOLUTION: A disposable diaper 10 comprises a pair of leg opening parts 35, and a pair of leg stretchable parts 75. Each leg stretchable part includes a first leg stretchable part 751, and a second leg stretchable part 752 located product-width-directional outward the first leg stretchable part. An auxiliary stretchable part 77 is provided product-width-directional outward the second leg stretchable part. A front-side end part 77F of the auxiliary stretchable part is disposed rearward a front-side end part 75F of the leg stretchable part. A rear-side end part 77R of the auxiliary stretchable part is disposed rearward a rear-side end part 75R of the leg stretchable part.
