A step of disposing a continuous body 35a of an elastic member in an extended state between a pair of opposed surfaces of a continuous body of a first sheet-like member continuous in the transport direction, and a joining portion j for joining the opposed surfaces. Forming a joint portion, and after superimposing the continuum of the second sheet-shaped member on the continuum of the first sheet-shaped member, the side seal portion SS for welding these continuities is formed at a predetermined pitch in the transport direction. Forming on both sides of the cutting target position PC set in the step, and cutting at the same position PC to generate the absorbent article 1 having the elastic member 35 and the first and second sheet-like members. And In the joint forming step, joints j, j are formed at positions on both sides in the CD direction of the continuous body 35a of the elastic member in the stretched state in the first sheet-like member. After the cutting step, the elastic member 35 expanded in the CD direction is pressed between the joints j on both sides. When viewed from the thickness direction, at least a part of the joint j is located between the side seal portion SS and the cutting target position PC.搬送方向に連続する第1シート状部材の連続体の対向する一対の対向面同士の間に、弾性部材の連続体35aを伸長状態で配置する工程と、上記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、第1シート状部材の連続体に第2シート状部材の連続体を重ね合わせた後に、これら連続体同士を溶着するサイドシール部SSを、搬送方向に所定ピッチで設定された切断対象位置PCの両側に形成する工程と、同位置PCで切断して、弾性部材35と第1及び第2シート状部材とを有した吸収性物品1を生成する切断工程と、を有する。接合部形成工程では、第1シート状部材において伸長状態の弾性部材の連続体35aのCD方向の両側の位置に接合部j,jを形成する。切断工程の後では、CD方向に拡大した弾性部材35は両側の接合部j,j同士で挟圧される。厚さ方向から見ると、少なくとも接合部jの一部がサイドシール部SSと切断対象位置PCとの間に位置する。