An embodiment method of manufacturing an interior component for a vehicle using a real material includes bonding a plurality of laminated printed layers on a rear surface of the real material, injection-molding an injection-molded product that processes a shape by putting the real material into a molding mold and laminating the real material on the injection-molded product injection-molded in a shape corresponding to the processed shape of the real material, forming a light-transmitting part that processes a symbol part on a front surface of the real material and forming a light-transmitting part protruding in a shape of the symbol part, and mounting a light source unit on the injection-molded product, the light source unit configured to be selectively lighted through the light-transmitting part in response to detecting a change in a capacitance from the front surface of the real material.