A manufacturing method of a decorative molded article having a layer which includes a thermosetting resin or a thermoplastic resin P2 on a surface of a fiber-reinforced resin shaped product including carbon fibers and a thermoplastic resin P1, comprising: (i) using a shaped product in which at least some carbon fibers are contained in a form of fiber bundle as the fiber-reinforced resin shaped product, and placing the fiber-reinforced resin shaped product containing the fiber bundle in a heated mold, wherein an average thickness of the fiber bundle is within a range from 10 μm to 300 μm; (ii) introducing the thermosetting resin or the thermoplastic resin P2 into the mold; (iii) molding the thermosetting resin or the thermoplastic resin P2 in the mold by pressurization; and (iv) cooling an inside of the mold, while maintaining the inside of the mold to a pressure within a range from 2 MPa to 50 MPa: to a temperature range from 10°C to a glass transition point when the thermoplastic resin P1 is an amorphous resin and the glass transition point is 10°C or more; to a temperature range from 10°C to a crystallization temperature when the thermoplastic resin P1 is a crystalline resin and the crystallization temperature is 10°C or more; or to a temperature range from 10°C to 80°C when the thermoplastic resin P1 is an amorphous resin and the glass transition point is less than 10°C or the thermoplastic resin P1 is an crystalline resin and the crystallization temperature is less than 10°C. (i) using a shaped product in which at least some carbon fibers are contained in a form of fiber bundle as the fiber-reinforced resin shaped product, and placing the fiber-reinforced resin shaped product containing the fiber bundle in a heated mold, wherein an average thickness of the fiber bundle is within a range from 10 μm to 300 μm; (ii) introducing the thermosetting resin or the thermoplastic resin P2 into the mold; (iii) molding the thermosetting resin or the thermoplastic resin P2 in the mold by pressurization; and (iv) cooling an inside of the mold, while maintaining the inside of the mold to a pressure within a range from 2 MPa to 50 MPa: to a temperature range from 10°C to a glass transition point when the thermoplastic resin P1 is an amorphous resin and the glass transition point is 10°C or more; to a temperature range from 10°C to a crystallization temperature when the thermoplastic resin P1 is a crystalline resin and the crystallization temperature is 10°C or more; or to a temperature range from 10°C to 80°C when the thermoplastic resin P1 is an amorphous resin and the glass transition point is less than 10°C or the thermoplastic resin P1 is an crystalline resin and the crystallization temperature is less than 10°C. to a temperature range from 10°C to a glass transition point when the thermoplastic resin P1 is an amorphous resin and the glass transition point is 10°C or more; to a temperature range from 10°C to a crystallization temperature when the thermoplastic resin P1 is a crystalline resin and the crystallization temperature is 10°C or more; or to a temperature range from 10°C to 80°C when the thermoplastic resin P1 is an amorphous resin and the glass transition point is less than 10°C or the thermoplastic resin P1 is an crystalline resin and the crystallization temperature is less than 10°C.