To adjust the level of an automobile floor to raise the floor face of a carpet using a raising material by molding resin foam into a specific range of thicknesses at a compressive strength not less than a specific numerical value, and depositing the resin foam on the underside of the automotive floor carpet.

Polypropylene foam is formed by injection molding at 150°C into a thickness of 2mm at its outer periphery and a thickness of 40mm at the other parts to match the shape of the floor part of an automotive rear seat, and a surface cover part having a thickness of 3mm, molded into the required shape from resin felt, is deposited on the portions other than the outer periphery, to provide an automotive floor raising material having a compressive strength of 30kg/cm2 and a thickness of 2mm to 80mm at those portions. As a result, the level of the floor can be adjusted by the raising material to raise the floor face of a carpet, while allowing the floor part to maintain an appropriate rigid feel and fit.