An apparatus (11) for producing stretchable sheet of the present invention includes a pair of conveyance belts (12, 13) which is separately arranged, elastic body winding means (14) which winds a threadlike elastic body (7) around the pair of conveyance belts (12, 13) and orients the threadlike elastic body (7) to a direction intersecting with a conveyance direction of continuous-length sheets, and integrating means which fixes the threadlike elastic body (7) to the continuous-length sheets. The conveyance belts (12, 13) include upper belts (12a, 13a) and lower belts (12b, 13b). Proceeding portions (12a, 13a) which convey the threadlike elastic body (7) at respective upper belts are inclined so that an upper side is located closer than a lower side to a center position (PC) between the conveyance belts, and proceeding portions (12b, 13b) which convey the threadlike elastic body (7) at respective lower belts are inclined so that a lower side is located closer than an upper side to a center position (PC).
