To provide a method for manufacturing a stretchable sheet capable of suppressing neck-in.In a supplying step, a stretchable elastic film 30 is interposed in a stretched state between a first sheet layer 21 having no elasticity and a second sheet layer 22 having no elasticity. In the supplying step, heat melt energy is applied to a region of a large number of bonded portions spaced apart from each other by a heat melting apparatus from the outside of the first sheet layer 21 and the second sheet layer 22 to melt the elastic film 30. The first sheet layer 21 and the second sheet layer 22 are bonded directly or via an elastic film at the large number of bonded portions. The elastic film 30 is caused to pass through the counter roll 63 and the nip roll 65 to pass along the counter roll 63 and then pass along the anvil roll 60, and the elastic film 30 is stretched by making the circumferential speed of the anvil roll 60 faster than the circumferential speed of the counter roll 63.
