A pants-type disposable diaper having an up-down direction, a front-rear direction and a width direction intersecting with the up-down direction and the front-rear direction, the pants-type disposable diaper comprising: an abdomen side waist part that is configured to stretch and contract along the width direction; a back side waist part; and a band-like absorbent main body that absorbs liquid, one end portion of the absorbent main body being arranged at the abdomen side waist part, another end portion of the absorbent main body being arranged at the back side waist part via a crotch, the abdomen side waist part including a cutout at a center part of an upper end region in the width direction, a number of members that is layered on the abdomen side waist part in at least a part of an edge region that includes an outer edge of the cutout being larger than a number of members that is layered on the abdomen side waist part in each of regions that are positioned on both sides of the absorbent main body in the width direction in a lower end region of the abdomen side waist part, wherein the abdomen side waist part includes: a first sheet arranged on a skin side of the wearer; a second sheet arranged on a non-skin side of the wearer; and a separate sheet that differs from the first sheet and the second sheet, the cutout is formed by penetrating the first sheet and the second sheet, and the separate sheet includes a region that overlaps with the edge region, and wherein the separate sheet is a design sheet that is arranged between the first sheet and the second sheet, and a region in the separate sheet which overlaps with the edge region is colored with a color different from an outside color of the edge region. an abdomen side waist part that is configured to stretch and contract along the width direction; a back side waist part; and a band-like absorbent main body that absorbs liquid, one end portion of the absorbent main body being arranged at the abdomen side waist part, another end portion of the absorbent main body being arranged at the back side waist part via a crotch, the abdomen side waist part including a cutout at a center part of an upper end region in the width direction, a number of members that is layered on the abdomen side waist part in at least a part of an edge region that includes an outer edge of the cutout being larger than a number of members that is layered on the abdomen side waist part in each of regions that are positioned on both sides of the absorbent main body in the width direction in a lower end region of the abdomen side waist part, wherein the abdomen side waist part includes: a first sheet arranged on a skin side of the wearer; a second sheet arranged on a non-skin side of the wearer; and a separate sheet that differs from the first sheet and the second sheet, the cutout is formed by penetrating the first sheet and the second sheet, and the separate sheet includes a region that overlaps with the edge region, and wherein the separate sheet is a design sheet that is arranged between the first sheet and the second sheet, and a region in the separate sheet which overlaps with the edge region is colored with a color different from an outside color of the edge region. a first sheet arranged on a skin side of the wearer; a second sheet arranged on a non-skin side of the wearer; and a separate sheet that differs from the first sheet and the second sheet, the cutout is formed by penetrating the first sheet and the second sheet, and the separate sheet includes a region that overlaps with the edge region, and wherein the separate sheet is a design sheet that is arranged between the first sheet and the second sheet, and a region in the separate sheet which overlaps with the edge region is colored with a color different from an outside color of the edge region.