Problem is to prevent seepage of urine and loose stools in a waist extended section of an outer member. The above-mentioned problem is solved by an underpants-type disposable diaper including outer members (12F and 12B) that separately or integrally configures a front body (F) and a back body (B), and an inner member (200) attached to the outer members (12F and 12B) from the front body (F) to the back body (B), the outer members (12F and 12B) having a waist extended section (12E) that extends to a side of the waist opening (WO) of an edge of the inner member (200) on a waist side, the underpants-type disposable diaper further including a display sheet (25) containing a liquid impervious resin film on an outer side of the inner member (200) in a region in which the outer members (12F and 12B) and the inner member (200) overlap with each other in at least one of the front body (F) and the back body (B), in which the display sheet (25) extends from a region overlapping the inner member (200) into the waist extended section (12E).
