Provided is a manufacturing method for a laminate-molded article whereby a laminate-molded article, obtained by temporarily adhering or laminating a laminate film, is laminated and flattened, the manufacturing method comprising the following steps. In step (a), a plurality of pressing plates, each having a different prescribed structure constituting body, are prepared in advance. In step (b), one pressing plate is selected from the plurality of pressing plates according to the state of a newly temporarily adhered or laminated base material. In step (c), a clamp part is prepared by attaching the selected pressing plate to a main surface of a disc body having a flat main surface. In step (d), the temperature of the clamp part is controlled such that the temperature of the clamp part is within a prescribed range. In step (e), the clamp part is pressed to the surface of the base material.

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