A step of feeding out the continuous body 35a of the elastic member by the over-end unwinding method, and disposing the continuous body 35a of the elastic member in an extended state between the opposing surfaces of the continuous body of the sheet-like members along the conveyance direction. Disposing step, a joint forming step for forming a joint j for joining the opposing surfaces, and cutting the continuum of the sheet-like member and the continuum of the elastic member 35a to generate the sheet-like member and the elastic member 35 And a cutting step. The cross-sectional shape of the elastic member continuum 35a has a longitudinal direction. In the arranging step, the continuous body 35a is brought into contact with the opposing surface while changing the posture so that the length of the lying portion 35ay is longer than the length of the upright portion 35ak in the continuous body 35a. In the joint forming step, the joints j are formed on both sides of the same continuous body 35a in the CD direction while maintaining the above posture. After the cutting step, the elastic member 35 expanded in the CD direction is attached to the sheet-like member by being pressed in the CD direction between the joints j.オーバーエンド解舒方式で弾性部材の連続体３５ａを繰り出す工程と、搬送方向に沿ったシート状部材の連続体の互いに対向する対向面同士の間に、弾性部材の連続体３５ａを伸長状態で配置する配置工程と、対向面同士を接合する接合部ｊを形成する接合部形成工程と、シート状部材の連続体及び弾性部材の連続体３５ａを切断してシート状部材及び弾性部材３５を生成する切断工程と、を有する。弾性部材の連続体３５ａの断面形状は、長手方向を有する。配置工程では、同連続体３５ａにおいて起立状部分３５ａｋの長さよりも横たわり状部分３５ａｙの長さの方が長くなるように姿勢を変更しながら、対向面に同連続体３５ａを当接する。接合部形成工程では、上記姿勢を維持しつつ、接合部ｊを同連続体３５ａのＣＤ方向の両側に形成する。切断工程の後では、ＣＤ方向に拡大した弾性部材３５は、接合部ｊ，ｊ同士でＣＤ方向に挟圧されてシート状部材に取り付けられている。
