The instrument panel is molded by closing the frame-shaped core 215 and separating the cavity into the base material part molding part and the different material part molding part, and the base material 103 serving as the base material part and the different material serving as the different material part. A first supply step for supplying the air to the cavity of 303, and opening the frame-shaped core 215 in a state where the pressure applied to the different material 303 is kept higher than the pressure applied to the base material 103; The different material 303 protrudes into the inside of the base material 103 at the center of the boundary between the base material 103 and the different material 303 in the thickness direction of the base material 103 and the different material 303 where the solidification of the base material 103 and the different material 303 is delayed. A second supply step. An instrument panel forming method, an instrument panel, and an instrument panel forming apparatus can manufacture an instrument panel with a small number of man-hours.
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