The disclosed manufacturing method is for continuously manufacturing an elastic sheet fixed in a state in which a elastic thread (7) extends between a pair of band-like sheets (50, 60) in a direction that intersects the y direction. The disclosed manufacturing method involves a supply step for introducing the elastic thread (7) onto a rotating arm (14) for winding the elastic thread a conveying step for using the rotating arm (14) to continuously wind the elastic thread (7) onto a pair of conveyor belts (12, 13) and conveying, by means of the conveyor belts (12, 13), the elastic thread (7) between the band-like sheets (50, 60) and a cutting step for cutting the portion of the elastic thread (7) extending from both ends in the x direction of the band-like sheets (50, 60).
