A method for manufacturing an absorbent article (1) including a first member (30), a second member (40), and a weld portion (SS) where the first member (30) and the second member (40) are welded to each other, the first member (30) including two sheet members (31, 32) having at least one nonwoven fabric, and an elastic member (35) stretchably contractible in a left-right direction, the second member (40) having a nonwoven fabric, the method comprising: an elastic member placing process (S302) of placing the elastic member (35) in a stretched state between the two sheet members (31, 32) in a thickness direction intersecting the left-right direction of the first member (30), the stretched state being a state in which the elastic member (35) is stretched in the left-right direction； an overlapping process (S506) of causing the second member (40) to overlap with the first member (30) in the thickness direction； a releasing process (S507) of releasing the stretched state to bring about a released state； and a welding process (S509) of welding one end portion in the left-right direction of the first member (30) and one end portion in the left-right direction of the second member (40) to each other, to form the weld portion (SS), the welding process (S509) being performed in the released state after the releasing process (S507).
