A step of disposing a continuous body of elastic members (35a) in a stretched state between a pair of opposing surfaces of a continuous body of a first sheet-like member continuous in the transport direction； Forming a portion (j), and, after superposing the continuum of the second sheet-like member on the continuum of the first sheet-like member, forming a side seal portion (SS) for welding these continuities together. Forming on both sides of a cutting target position (PC) set at a predetermined pitch in the transport direction； cutting at the cutting target position to form an elastic member (35), a first sheet-like member, a second sheet-like member, And a cutting step of producing an absorbent article (1) having the following. In the joint forming step, the joints are formed on both sides of the continuum in the CD direction while maintaining the continuum of the elastic member in the stretched state. After the cutting step, the elastic member expanded in the CD direction is sandwiched between the joints on both sides. When viewed from the thickness direction, at least a part of the joint part overlaps the side seal part.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、切断対象位置で切断して、弾性部材（３５）と第１シート状部材と第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、弾性部材の連続体を伸長状態に維持しつつ、接合部を、ＣＤ方向において同連続体の両側に形成する。切断工程の後では、ＣＤ方向に拡大した弾性部材は、両側の接合部同士で挟圧されている。厚さ方向から見ると、少なくとも接合部の一部がサイドシール部に重なる。
