A production device for a stretchable sheet, that produces a stretchable sheet having individual threadlike elastic members that are in an elongated state being interposed and bonded between a pair of continuous sheets, in a state in which said threadlike elastic members are arranged along an intersecting direction that intersects the continuation direction of the continuous sheets. The production device for a stretchable sheet comprises: a bonding mechanism (21) that feeds the pair of continuous sheets (11, 12) along the continuation direction for the continuous sheets (11, 12), and clamps and bonds the continuous sheets (11, 12) in the thickness direction thereof 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 bonded by the 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, on to the conveyance mechanism (31) and a cutting mechanism (51) that, after the pair of continuous sheets (11, 12) have been clamped by the bonding mechanism (21), cuts the continuous body (13a) of threadlike elastic members at a position further on the end side in an intersecting direction than the continuous sheets (11, 12), and generates individual threadlike elastic members (13, 13, …). At least one continuous sheet (11) out of the pair of continuous sheets (11, 12) has a bonding section that bonds the continuous body (13a) of threadlike elastic members at each end section, in the intersecting direction, of the pair of continuous sheets (11, 12). The bonding mechanism (21) has: reference clamping sections (21AL) provided corresponding to each bonding section position, and clamping the pair of continuous sheets (11, 12) and the continuing body (13a) of threadlike elastic members, in the thickness direction and at a prescribed reference pressure and weak clamping sections (2
