A laminated work production apparatus for producing a laminated work (W, WA, WB) by punching a plate-like metal material into a plate-like work (W, WA, WB) of a predetermined shape and stacking a plurality of the plate-like works (W, WA, WB), comprising: - a mold for punching the metal material; - a stacking jig moving mechanism for moving a first stacking jig (10A, 10B) to a stacking position where the plate-like works (W, WA, WB) are stacked; - a retention mechanism for retaining the punched plate-like works (W, WA, WB) at a retaining position different from the stacking position until a preset number is reached; and - a knockout mechanism for knocking out a plurality of plate-like works (W, WA, WB) in a punching direction and stacking the plate-like works on the first stacking jig (10A, 10B) arranged at the stacking position when the preset number of plate-like works are retained in the retention mechanism; characterized in that - two conveying devices (40A, 40B) are comprised for conveying the first stacking jig (10A, 10B), on which the plate-like works (W, WA, WB) are stacked, to the outside of the mold; and - two transfer devices (70A, 70B) are comprised for transferring the plate-like works (W, WA, WB) from the first stacking jig (10A, 10B) to a second stacking jig outside the mold; - the two transfer devices (70A, 70B) are configured in order to rotate the second stacking jig by a predetermined angle about a stacking direction every time the plate-like works (W, WA, WB) are transferred, - the two longitudinal conveying devices (40A, 40B) are configured in order to convey two first stacking jigs (10A, 10B) for holding and conveying the plate-like works (W, WA, WB) between loading/unloading positions (B, B1, B2) and the respective transfer devices (70A, 70B) arranged at final ends outside the press facility, - a lateral conveying device is provided which is configured in order to load and unload the respective second stacking jigs for rotor core and stator core to the two transfer devices (70A, 70B), - the two longitudinal conveying devices (40A, 40B) are configured in order to operate to load empty first stacking jigs (10A, 10B) to the loading positions (B, B1) of the mold, to unload the first stacking jigs (10A, 10B) holding the plate-like works (W, WA, WB) from the unloading positions (B, B2), and to convey the first stacking jigs (10A, 10B) to the transfer devices (70A, 70B) arranged at the final ends outside the press facility, and - the lateral conveying device is configured in order to operate to load the respective empty second stacking jigs for rotor core and stator core to the respective longitudinal transfer devices (70A, 70B) and unload the respective second stacking jigs, on which a preset number of plate-like works (W, WA, WB) are stacked by the respective transfer devices (70A, 70B), from the respective transfer devices (70A, 70B). - a mold for punching the metal material; - a stacking jig moving mechanism for moving a first stacking jig (10A, 10B) to a stacking position where the plate-like works (W, WA, WB) are stacked; - a retention mechanism for retaining the punched plate-like works (W, WA, WB) at a retaining position different from the stacking position until a preset number is reached; and - a knockout mechanism for knocking out a plurality of plate-like works (W, WA, WB) in a punching direction and stacking the plate-like works on the first stacking jig (10A, 10B) arranged at the stacking position when the preset number of plate-like works are retained in the retention mechanism; characterized in that - two conveying devices (40A, 40B) are comprised for conveying the first stacking jig (10A, 10B), on which the plate-like works (W, WA, WB) are stacked, to the outside of the mold; and - two transfer devices (70A, 70B) are comprised for transferring the plate-like works (W, WA, WB) from the first stacking jig (10A, 10B) to a second stacking jig outside the mold; - the two transfer devices (70A, 70B) are configured in order to rotate the second stacking jig by a predetermined angle about a stacking direction every time the plate-like works (W, WA, WB) are transferred, - the two longitudinal conveying devices (40A, 40B) are configured in order to convey two first stacking jigs (10A, 10B) for holding and conveying the plate-like works (W, WA, WB) between loading/unloading positions (B, B1, B2) and the respective transfer devices (70A, 70B) arranged at final ends outside the press facility, - a lateral conveying device is provided which is configured in order to load and unload the respective second stacking jigs for rotor core and stator core to the two transfer devices (70A, 70B), - the two longitudinal conveying devices (40A, 40B) are configured in order to operate to load empty first stacking jigs (10A, 10B) to the loading positions (B, B1) of the mold, to unload the first stacking jigs (10A, 10B) holding the plate-like works (W, WA, WB) from the unloading positions (B, B2), and to convey the first stacking jigs (10A, 10B) to the transfer devices (70A, 70B) arranged at the final ends outside the press facility, and - the lateral conveying device is configured in order to operate to load the respective empty second stacking jigs for rotor core and stator core to the respective longitudinal transfer devices (70A, 70B) and unload the respective second stacking jigs, on which a preset number of plate-like works (W, WA, WB) are stacked by the respective transfer devices (70A, 70B), from the respective transfer devices (70A, 70B).