A pants-type diaper comprising: an absorber having a core including a pulp, the absorber being configured so that each face of the core is sandwiched by a covering sheet, wherein: at least two folding lines (3A, 3B) which are extensive in a longitudinal direction of the pants-type diaper and which are spaced in a widthwise direction of the pants-type diaper are formed at the absorber that is disposed in a crotch region of the pants-type diaper; a plurality of compression lines which are extensive in a widthwise direction of the pants-type diaper and which are spaced in the longitudinal direction of the pants-type diaper are formed in a predetermined region of the absorber; the predetermined region is a region which includes the folding lines (3A, 3B) and which is extensive in a widthwise direction from one side edge part to the other side edge part of the absorber; an angle which is formed by a centerline along a widthwise direction located in the compression lines and the widthwise direction of the pants-type diaper is configured so as to be included in a range of 0 degrees to 45 degrees; and two of the compression lines which are adjacent to each other in the longitudinal direction of the pants-type diaper are configured so as to approach at a predetermined portion; the core is made of: an intermediate layer, in which a pulp and an SAP are mixed with each other, and a pulp layer; the folding line is formed by a slit; and the pulp layer is configured so as to exist on a wall face of the slit and the intermediate layer is configured so as not to exist on the wall face of the slit; and the intermediate layer is configured so as to be disposed inside of the pulp layer. an absorber having a core including a pulp, the absorber being configured so that each face of the core is sandwiched by a covering sheet, wherein: at least two folding lines (3A, 3B) which are extensive in a longitudinal direction of the pants-type diaper and which are spaced in a widthwise direction of the pants-type diaper are formed at the absorber that is disposed in a crotch region of the pants-type diaper; a plurality of compression lines which are extensive in a widthwise direction of the pants-type diaper and which are spaced in the longitudinal direction of the pants-type diaper are formed in a predetermined region of the absorber; the predetermined region is a region which includes the folding lines (3A, 3B) and which is extensive in a widthwise direction from one side edge part to the other side edge part of the absorber; an angle which is formed by a centerline along a widthwise direction located in the compression lines and the widthwise direction of the pants-type diaper is configured so as to be included in a range of 0 degrees to 45 degrees; and two of the compression lines which are adjacent to each other in the longitudinal direction of the pants-type diaper are configured so as to approach at a predetermined portion; at least two folding lines (3A, 3B) which are extensive in a longitudinal direction of the pants-type diaper and which are spaced in a widthwise direction of the pants-type diaper are formed at the absorber that is disposed in a crotch region of the pants-type diaper; a plurality of compression lines which are extensive in a widthwise direction of the pants-type diaper and which are spaced in the longitudinal direction of the pants-type diaper are formed in a predetermined region of the absorber; the predetermined region is a region which includes the folding lines (3A, 3B) and which is extensive in a widthwise direction from one side edge part to the other side edge part of the absorber; an angle which is formed by a centerline along a widthwise direction located in the compression lines and the widthwise direction of the pants-type diaper is configured so as to be included in a range of 0 degrees to 45 degrees; and two of the compression lines which are adjacent to each other in the longitudinal direction of the pants-type diaper are configured so as to approach at a predetermined portion; the core is made of: an intermediate layer, in which a pulp and an SAP are mixed with each other, and a pulp layer; the folding line is formed by a slit; and the pulp layer is configured so as to exist on a wall face of the slit and the intermediate layer is configured so as not to exist on the wall face of the slit; and the intermediate layer is configured so as to be disposed inside of the pulp layer.