To provide a panel molding device for efficiently manufacturing panels from the single panel molding device.

This panel molding device 1 is equipped with a core retainer plate 3, on both the sides of which molding surfaces 31 are arranged vertically, frame retainer plates 2, on one side of each of which a molding surface 21 is formed and which opens and closes opposite to the respective molding surfaces 31 of the core retainer plate 3. On both the sides of the core retainer plate 3 under the condition that the frame retainer plates 2 are closed, respectively upwards opened panel molding forms 10 are formed. In addition, mold mats 21a and 31a of the molding surfaces 21 and 31 are made renewable.