A rotor (3) which is formed by this method for producing a squirrel-cage rotor comprises: a rotor core (9) that is a laminate of a plurality of steel sheets (9a); and conductors (11) that are respectively contained in a plurality of slots (10) which are arranged in the circumferential direction of a circle that is centered on the rotary shaft in the rotor core (9). This method for producing a squirrel-cage rotor comprises a step for providing each slot (10) with an insulating layer (13) by applying an insulating coating material to the inner peripheral surface of each slot (10) of the plurality of slots (10). The insulating coating material contains: a silicone resin that is composed of at least one of a silicone resin having a methyl phenyl group and a silicone resin modified with an alkyd resin; inorganic compound particle aggregates wherein primary particles have self-assembling properties; and a diluent solvent.