PURPOSE: To provide an odd-shaped article panel for construction, in which a labor hour and a time at a time when a frame material is installed after a hydraulic inorganic molded form is cured are omitted, which is economical and in which there are no cracking and breaking of the hydraulic inorganic molded form and peeling of adhesion at the time of machining and after machining and deterioration of a fine view by nails and setscrews, etc., are eliminated.

CONSTITUTION: A frame material 1b, to a top face of which projections 1b1 are protruded, is placed in a receiving gutter formed to the top face of a tray 6, and the extrusion molding of a hydraulic inorganic material is shifted onto the tray 6. The tray 6 is positioned onto the bottom force 13 of a press molding die and press-molded by a top force 7 while the projections 1b1 are penetrated into a press molding 14 and the bonded body of the press molding 14 and the frame material 1b is formed and cured and hardened on the tray 6.