Provided is a fiber-reinforced resin molded body that has continuous voids and includes a carbon fiber nonwoven fabric and a thermosetting resin, in which the continuous voids have a porosity of 50% by volume to 97% by volume, and contact points of discontinuous carbon fibers constituting the carbon fiber nonwoven fabric are immobilized by the thermosetting resin having a substantially spherical shape of 40 m to 300 m in diameter. Also provided is a method of producing a fiber-reinforced resin molded body, the method including the following steps in the order mentioned: the preform forming step of forming a preform including a carbon fiber nonwoven fabric in a molding die; the injection preparation step of forming a closed space in which the preform is arranged; the injection step of injecting a liquid thermosetting resin into the closed space; the porosity adjustment step of allowing the carbon fiber nonwoven fabric to expand in the thickness direction; and the curing step of maintaining the preform at a temperature equal to or higher than a curing temperature of the thermosetting resin. According to this method, a fiber-reinforced resin molded body that includes a carbon fiber nonwoven fabric and a thermosetting resin is simply produced.

In a method for producing a fiber-reinforced resin molded body (10) by heat-compressing fiber substrates (11A to 11D) together with a thermosetting resin (15) so that the thermosetting resin (15) is impregnated into the fiber substrates (11A to 11D) and cured, a thermosetting resin powder (15A) is disposed in contact with at least one surface of the fiber substrates (11A to 11D), the fiber substrates (11A to 11D) are heat-compressed together with the thermosetting resin powder (15A) by a mold (30) so that the thermosetting resin powder (15A) is melted, impregnated into the fiber substrates (11A to 11D), and cured. Also disclosed is a fiber-reinforced resin molded body as well as a vehicle or airframe including a fiber-reinforced resin molded body.