A production device for a stretchable sheet, that produces a stretchable sheet (10) having individual threadlike elastic members (13) in an elongated state being interposed and bonded between a pair of continuous sheets (11, 12), in a state in which said threadlike elastic members (13) are arranged along an intersecting direction that intersects the continuation direction of the continuous sheets (11, 12). The production device for a stretchable sheet comprises: a provisional bonding mechanism (21) that feeds the pair of continuous sheets (11, 12) along a continuation direction for the continuous sheets (11, 12), and clamps and provisionally bonds the continuous sheets (11, 12) in the thickness direction thereof, at a provisional bonding pressure a conveyance mechanism (31) that conveys a continuous body (13a) of threadlike elastic members towards between the pair of continuous sheets (11, 12) clamped and provisionally bonded by the provisional bonding mechanism (21) a winding mechanism (41) that feeds out the continuous body (13a) of threadlike elastic members and winds same, in an elongated state, onto the conveyance mechanism (31) a cutting mechanism (51) that, after the pair of continuous sheets (11, 12) have been clamped by the provisional bonding mechanism (21), cuts the continuous body (13a) of threadlike elastic members at a position further on the end side in the intersecting direction than the continuous sheets (11, 12), and generates individual threadlike elastic members (13, 13, &mldr) and a main bonding mechanism (61) that, after the continuous body (13a) of threadlike elastic members has been cut, properly bonds the pair of continuous sheets (11, 12), in the thickness direction and at a main bonding pressure that is greater than the provisional bonding pressure.
