To combine high breathability and high peel strength. [Solution] The aforementioned problem is addressed by a pants type disposable diaper comprising an elastic area (80) which can stretch in at least one direction and which is provided to an outer shell (20) wherein the elastic area (80) is formed by a first sheet layer (20A) made from nonwoven cloth and a second sheet layer (20B) made from nonwoven cloth having laminated therebetween an elastic film (30) and with the elastic film (30) stretched in the direction of extension the first sheet layer (20A) and second sheet layer (20B) are joined via through holes (31) formed in the elastic film (30) at a large number of sheet joining sections (40) which are positioned in the direction of extension and in the direction orthogonal thereto with intervals therebetween and at the sheet joining sections (40) the first sheet layer (20A) and second sheet layer (20B) are joined by a melted and solidified part (30m) of the elastic film (30) that extends at least across the first sheet layer (20A) and second sheet layer (20B).
