PROBLEM TO BE SOLVED: To provide a method for manufacturing a stretchable sheet which is improved in appearance by allowing unnecessary parts at both ends of a thread-like elastic body to be arranged and cut short.SOLUTION: The method for continuously manufacturing the stretchable sheet with the thread-like elastic body 7 fixed in the extended state in a direction to intersect a y-direction between a pair of strip sheets 50, 60 includes a supply step for introducing the thread-like elastic body 7 to a rotating arm 14 for winding the elastic body, a conveying step for using the rotating arm 14 to continuously wind the thread-like elastic body 7 onto a pair of conveying belts 12, 13 and conveying the thread-like elastic body 7 between the strip sheets 50, 60 by the conveying belts 12, 13, and a cutting step for cutting the portions of the thread-like elastic body 7 extended from both ends in the x-direction of the strip sheets 50, 60. In the cutting step, the extended portions of the thread-like elastic body 7 are cut inside the conveying belts while holding the extended state to remove the extended portions of the thread-like elastic body 7.
