A method for producing a foam-molded product by using a plasticizing cylinder which has a plasticization zone for plasticizing and melting a thermoplastic resin into a molten resin and a starvation zone for allowing the molten resin to be in a starved state, and which has an introducing port for introducing a physical foaming agent into the starvation zone, the method comprising: plasticizing and melting the thermoplastic resin to provide the molten resin in the plasticization zone; introducing a pressurized fluid containing the physical foaming agent at a fixed pressure into the starvation zone, thereby retaining the starvation zone at the fixed pressure; allowing the molten resin to be in the starved state in the starvation zone; bringing the molten resin in the starved state in contact with the pressurized fluid containing the physical foaming agent at the fixed pressure, in the starvation zone in a state in which the starvation zone is retained at the fixed pressure; and molding the molten resin having been brought in contact with the pressurized fluid containing the physical foaming agent into the foam-molded product, wherein the thermoplastic resin does not contain any chemical foaming agent, and either (i) the thermoplastic resin contains 60% by weight or more of a first super engineering plastic, and the fixed pressure is from 0.5 MPa to 6 MPa; or (ii) the thermoplastic resin is a second super engineering plastic containing a polyphenylene sulfide, and the fixed pressure is from 2 MPa to 10 MPa. the method comprising: plasticizing and melting the thermoplastic resin to provide the molten resin in the plasticization zone; introducing a pressurized fluid containing the physical foaming agent at a fixed pressure into the starvation zone, thereby retaining the starvation zone at the fixed pressure; allowing the molten resin to be in the starved state in the starvation zone; bringing the molten resin in the starved state in contact with the pressurized fluid containing the physical foaming agent at the fixed pressure, in the starvation zone in a state in which the starvation zone is retained at the fixed pressure; and molding the molten resin having been brought in contact with the pressurized fluid containing the physical foaming agent into the foam-molded product, plasticizing and melting the thermoplastic resin to provide the molten resin in the plasticization zone; introducing a pressurized fluid containing the physical foaming agent at a fixed pressure into the starvation zone, thereby retaining the starvation zone at the fixed pressure; allowing the molten resin to be in the starved state in the starvation zone; bringing the molten resin in the starved state in contact with the pressurized fluid containing the physical foaming agent at the fixed pressure, in the starvation zone in a state in which the starvation zone is retained at the fixed pressure; and molding the molten resin having been brought in contact with the pressurized fluid containing the physical foaming agent into the foam-molded product, wherein the thermoplastic resin does not contain any chemical foaming agent, and either (i) the thermoplastic resin contains 60% by weight or more of a first super engineering plastic, and the fixed pressure is from 0.5 MPa to 6 MPa; or (ii) the thermoplastic resin is a second super engineering plastic containing a polyphenylene sulfide, and the fixed pressure is from 2 MPa to 10 MPa. (i) the thermoplastic resin contains 60% by weight or more of a first super engineering plastic, and the fixed pressure is from 0.5 MPa to 6 MPa; or (ii) the thermoplastic resin is a second super engineering plastic containing a polyphenylene sulfide, and the fixed pressure is from 2 MPa to 10 MPa.