A method of manufacturing a permanent magnet, comprising: press-forming alloy powder in a magnetic field to fabricate a compression molded body; sintering the compression molded body to fabricate a sintered body; performing a solution heat treatment on the sintered body; and performing a aging heat treatment on sintered body after the solution heat treatment, wherein the solution heat treatment includes: performing a heat treatment on a treatment object having the sintered body at a temperature T ST of 1100 to 1200 °C inside a heating chamber having a heater; transferring a cooling member into the heating chamber after the heat treatment and placing the cooling member between the heater and the treatment object, the cooling member including a first layer and a second layer on the first layer, the first layer having a first thermal emissivity of 0.5 or more, the second layer having a second thermal emissivity of less than 0.5, and the first layer being faced with the treatment object; and transferring the treatment object together with the cooling member to the outside of the heating chamber, and cooling the treatment object until a temperature of the treatment object becomes a temperature lower than a temperature T ST - 200°C, wherein in cooling the treatment object, a cooling rate until the temperature of the treatment object becomes the temperature T ST - 200°C is 5 °C/s or more, and wherein the permanent magnet is expressed by a composition formula: R p Fe q M r Cu t Co 100-p-q-r-t, where R represents at least one element selected from the group consisting of rare earth elements, M represents at least one element selected from a group consisting of Zr, Ti, and Hf, p is a number satisfying 10.5 ≤ p ≤ 12.5 atomic percent, q is a number satisfying 27 ≤ q ≤ 40 atomic percent, r is a number satisfying 0.88 ≤ r ≤ 4.5 atomic percent, and t is a number satisfying 4.5 ≤ t ≤ 10.7 atomic percent. press-forming alloy powder in a magnetic field to fabricate a compression molded body; sintering the compression molded body to fabricate a sintered body; performing a solution heat treatment on the sintered body; and performing a aging heat treatment on sintered body after the solution heat treatment, wherein the solution heat treatment includes: performing a heat treatment on a treatment object having the sintered body at a temperature T ST of 1100 to 1200 °C inside a heating chamber having a heater; transferring a cooling member into the heating chamber after the heat treatment and placing the cooling member between the heater and the treatment object, the cooling member including a first layer and a second layer on the first layer, the first layer having a first thermal emissivity of 0.5 or more, the second layer having a second thermal emissivity of less than 0.5, and the first layer being faced with the treatment object; and transferring the treatment object together with the cooling member to the outside of the heating chamber, and cooling the treatment object until a temperature of the treatment object becomes a temperature lower than a temperature T ST - 200°C, performing a heat treatment on a treatment object having the sintered body at a temperature T ST of 1100 to 1200 °C inside a heating chamber having a heater; transferring a cooling member into the heating chamber after the heat treatment and placing the cooling member between the heater and the treatment object, the cooling member including a first layer and a second layer on the first layer, the first layer having a first thermal emissivity of 0.5 or more, the second layer having a second thermal emissivity of less than 0.5, and the first layer being faced with the treatment object; and transferring the treatment object together with the cooling member to the outside of the heating chamber, and cooling the treatment object until a temperature of the treatment object becomes a temperature lower than a temperature T ST - 200°C, wherein in cooling the treatment object, a cooling rate until the temperature of the treatment object becomes the temperature T ST - 200°C is 5 °C/s or more, and wherein the permanent magnet is expressed by a composition formula: R p Fe q M r Cu t Co 100-p-q-r-t, where R represents at least one element selected from the group consisting of rare earth elements, M represents at least one element selected from a group consisting of Zr, Ti, and Hf, p is a number satisfying 10.5 ≤ p ≤ 12.5 atomic percent, q is a number satisfying 27 ≤ q ≤ 40 atomic percent, r is a number satisfying 0.88 ≤ r ≤ 4.5 atomic percent, and t is a number satisfying 4.5 ≤ t ≤ 10.7 atomic percent.