A method for manufacturing a press-molded article, comprising molding a blank material which is a steel plate into a press-molded article by sandwiching the blank material between a first molding surface and a second molding surface of a die, and press-molding the blank material into a predetermined shape; wherein the method comprises irradiating a predetermined portion of the press-molded article with infrared light after removing the press-molded article from the die, wherein the irradiating comprises: sandwiching the press-molded article in contact with a first retaining surface (303, 403, 503) and a second retaining surface (304, 404, 504) of a retainer (300, 400, 500) along a shape of the press-molded article, after removing the press-molded article from the die; and irradiating the predetermined portion with infrared light from a first infrared irradiating unit (307, 407, 507) provided in a first recess (306, 406, 506) of the first retaining surface (303, 403, 503) opposed to the predetermined portion of the press-molded article, with the press-molded article sandwiched in contact with the first retaining surface (303, 403, 503) and the second retaining surface (304, 404, 504), the first infrared irradiating unit (307, 407, 507) includes an infrared heater (307, 407, 507), and the predetermined portion includes a bent portion with a shape deformed by press-molding. molding a blank material which is a steel plate into a press-molded article by sandwiching the blank material between a first molding surface and a second molding surface of a die, and press-molding the blank material into a predetermined shape; wherein the method comprises irradiating a predetermined portion of the press-molded article with infrared light after removing the press-molded article from the die, wherein the irradiating comprises: sandwiching the press-molded article in contact with a first retaining surface (303, 403, 503) and a second retaining surface (304, 404, 504) of a retainer (300, 400, 500) along a shape of the press-molded article, after removing the press-molded article from the die; and irradiating the predetermined portion with infrared light from a first infrared irradiating unit (307, 407, 507) provided in a first recess (306, 406, 506) of the first retaining surface (303, 403, 503) opposed to the predetermined portion of the press-molded article, with the press-molded article sandwiched in contact with the first retaining surface (303, 403, 503) and the second retaining surface (304, 404, 504), the first infrared irradiating unit (307, 407, 507) includes an infrared heater (307, 407, 507), and the predetermined portion includes a bent portion with a shape deformed by press-molding. sandwiching the press-molded article in contact with a first retaining surface (303, 403, 503) and a second retaining surface (304, 404, 504) of a retainer (300, 400, 500) along a shape of the press-molded article, after removing the press-molded article from the die; and irradiating the predetermined portion with infrared light from a first infrared irradiating unit (307, 407, 507) provided in a first recess (306, 406, 506) of the first retaining surface (303, 403, 503) opposed to the predetermined portion of the press-molded article, with the press-molded article sandwiched in contact with the first retaining surface (303, 403, 503) and the second retaining surface (304, 404, 504), the first infrared irradiating unit (307, 407, 507) includes an infrared heater (307, 407, 507), and the predetermined portion includes a bent portion with a shape deformed by press-molding.