A production device (11) for this stretch sheet is provided with: a pair of conveyance belts (12 13) arranged to be distant from each other an elastic body winding means (14) for winding a threadlike elastic body (7) around the conveyance belts so that the threadlike elastic body (7) is directed in the direction intersecting the conveyance direction of a belt like sheet and an integration means for securing the threadlike elastic body (7) to the belt like sheet. The conveyance belts (12 13) are provided with upper belts (12a 13a) and lower belts (12b 13b) wherein forward feeding portions (12a 13a ) of the respective upper belts to convey the threadlike elastic body (7) are inclined so that the upper ends are located closer to the center position (PC) between the conveyance belts than the lower ends and the forward feeding portions (12b 13b ) of the lower belts inclined so that the lower ends are located closer to the center position (PC) than the upper ends.
