The refrigerant flowing through the first refrigerant flow path hole 25 is supplied to the second refrigerant discharge hole 42b of the second end plate 40b through the second groove portion 44b as indicated by the arrow T2 in FIGS. 3 and 5 and supplied to the second refrigerant flow path hole 26 of the rotor core 20 through the second groove portion 44b as indicated by the arrow T3 in FIG. 6. The first refrigerant discharge hole 42a (second refrigerant flow path hole 26) and the second refrigerant discharge hole 42b are alternately arranged in the circumferential direction when viewed from the axial direction and the first refrigerant flow path hole 25 is arranged between the first refrigerant discharge hole 42a (second refrigerant flow path hole 26) and the second refrigerant discharge hole 42b. Therefore, the refrigerant flowing through the first refrigerant flow path hole 25 is distributed substantially evenly into the second refrigerant flow path hole 26 and the second refrigerant discharge hole 42b. Therefore, a part of the refrigerant supplied to the first refrigerant flow path hole 25 flows through the rotor core in one direction in the axial direction and the remaining refrigerant flowing through the first refrigerant flow path hole 25 flows through the rotor core in one direction in the axial direction and then flows back in an opposite direction. Since the outer diameter side apex portion 26e of the second refrigerant flow path hole 26 is located further on a radially outer side than the outermost diameter portion 25e of the first refrigerant flow path hole 25, it is easy to guide the refrigerant to the second refrigerant flow path hole 26.