To improve a covering property of a gluteal region and an inguinal portion in an underpants-type disposable diaper.The above problem is solved by the following. That is, the rising gather 60 includes: a main unit portion having a first portion 60A extending from both sides of a surface of an inner member 200 toward the center in the width direction and a second portion 60B extending from a tip of the first portion 60A outward in the width direction； and a front fallen portion 67F and a back fallen portion 67B formed by fixing a front end portion and a back end portion in the main unit portion to a surface of the inner member 200 in a state of falling down, respectively. Each of the front fallen portion 67F and the back fallen portion 67B has a protruding portion 69 in which the second portion 60B protrudes 5 to 40 mm outward in the width direction than a side edge of the first portion 60A. The protruding portion 69 of the front fallen portion 67F has a protruding fixing portion CF fixed to the front outer member 12F overlapping with a back surface side thereof, and the protruding portion 69 of the back fallen portion 67B has a protruding fixing portion CF fixed to the back outer member 12B overlapping with a back surface side thereof.
