An object of the present invention is to make it possible to tighten the waist portion more strongly without increasing the thickness of the waist portion. A first sheet layer 20A and a second sheet layer 20B of an exterior body 20 are sheet joint portions 40 arranged at an interval, and the first sheet layer 20A and the second sheet layer 20B are separated from each other. A non-porous band 32 continuous in the width direction WD in the unfolded state and the sheet joint portion 40 are welded through the joint hole 31 penetrating the elastic sheet 30 interposed therebetween and in the stretchable region 80 of the waist portion 23. Bonding bands 53 arranged at intervals in the width direction WD are alternately and repeatedly provided in the orthogonal direction XD, and the stretchable region 80 of the waist adjacent portion 22 is continuously extended along the width direction WD in the unfolded state. The hole band 32 is provided, and the dimension in the orthogonal direction XD of the plurality of holeless bands 32 in the waist part 23 is longer than the dimension in the orthogonal direction XD of the holeless band 32 of the waist adjacent part 22 It is determined. [Selection] Figure 19【課題】ウエスト部の厚み増加なく、ウエスト部をより強く締め付け可能とする。【解決手段】上記課題は、外装体２０の第１シート層２０Ａ及び第２シート層２０Ｂは、間隔を空けて配列されたシート接合部４０で、第１シート層２０Ａ及び第２シート層２０Ｂの間に介在された弾性シート３０を貫通する接合孔３１を通じて溶着され、ウエスト部２３の伸縮領域８０には、展開状態で幅方向ＷＤに沿って連続する無孔帯３２と、シート接合部４０が幅方向ＷＤに間隔を空けて配置された接合帯５３とが、直交方向ＸＤに交互に繰り返し設けられ、ウエスト隣接部２２の伸縮領域８０には、展開状態で幅方向ＷＤに沿って連続する無孔帯３２が設けられるとともに、ウエスト部２３における複数本の無孔帯３２の直交方向ＸＤの寸法が、ウエスト隣接部２２の無孔帯３２の前記直交方向ＸＤの寸法よりも長い、ことにより解決される。【選択図】図１９
