The first refrigerant flow path hole 25 has a substantially pentagonal shape including an apex portion protruding radially inward and includes an inner diameter side apex portion 25d protruding radially inward. The second refrigerant flow path hole 26 and the third refrigerant flow path hole 27 have the same shape. The second refrigerant flow path hole 26 and the third refrigerant flow path hole 27 have a substantially quadrangular shape which is convex on both sides in the circumferential direction and both sides in the radial direction and include inner diameter side apex portions 26d and 27d which protrude radially inward. The inner diameter side apex portions 26d and 27d of the second refrigerant flow path hole 26 and the third refrigerant flow path hole 27 are located further on the radially outer side than the inner diameter side apex 25d of the first reactant flow path hole 25. That is, in the cooling portion 22 of the rotor core 20, the inner diameter side top portion 25d of the first refrigerant flow path hole 25 is located on the innermost side in the radial direction. Outer diameter side apex portions 26e and 27e of the second refrigerant flow path hole 26 and the third refrigerant flow path hole 27 are located further on the outer side in the radial direction than an outermost diameter portion 25e of the first refrigerant flow path hole 25.

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