A method for manufacturing a rotor including a rotor core and a permanent magnet, the rotor core having a magnet hole, and the permanent magnet being inserted in the magnet hole and fixed to the rotor core with an adhesive, comprising the steps of: applying the adhesive, which contains a volatile diluting solvent serving as a volatile agent and an expanding agent that expands when heated to a temperature equal to or higher than an expansion start temperature, to the permanent magnet or the magnet hole; inserting the permanent magnet into the magnet hole of the rotor core; after the step of inserting the permanent magnet into the magnet hole, volatilizing the diluting solvent by heating the adhesive to a temperature in a temperature range equal to or higher than a vaporization start temperature at which the diluting solvent volatilizes and lower than the expansion start temperature and increasing the temperature of the adhesive at a rate lower than that at which the temperature of the adhesive is increased when the adhesive is heated from a heating start temperature to a temperature in the temperature range equal to or higher than the vaporization start temperature and lower than the expansion start temperature; after the step of volatilizing the diluting solvent, expanding the expanding agent by heating the adhesive to a temperature equal to or higher than the expansion start temperature; and after expanding the expanding agent, fixing the permanent magnet to the rotor core with the adhesive by curing the adhesive by heating the adhesive to a temperature equal to or higher than a curing temperature, wherein the adhesive is thermosetting and the curing temperature of the adhesive is higher than the expansion start temperature. applying the adhesive, which contains a volatile diluting solvent serving as a volatile agent and an expanding agent that expands when heated to a temperature equal to or higher than an expansion start temperature, to the permanent magnet or the magnet hole; inserting the permanent magnet into the magnet hole of the rotor core; after the step of inserting the permanent magnet into the magnet hole, volatilizing the diluting solvent by heating the adhesive to a temperature in a temperature range equal to or higher than a vaporization start temperature at which the diluting solvent volatilizes and lower than the expansion start temperature and increasing the temperature of the adhesive at a rate lower than that at which the temperature of the adhesive is increased when the adhesive is heated from a heating start temperature to a temperature in the temperature range equal to or higher than the vaporization start temperature and lower than the expansion start temperature; after the step of volatilizing the diluting solvent, expanding the expanding agent by heating the adhesive to a temperature equal to or higher than the expansion start temperature; and after expanding the expanding agent, fixing the permanent magnet to the rotor core with the adhesive by curing the adhesive by heating the adhesive to a temperature equal to or higher than a curing temperature, wherein the adhesive is thermosetting and the curing temperature of the adhesive is higher than the expansion start temperature.