A rotor core includes plural holes in which permanent magnets are installed, wherein: at least one of the plural holes includes a first end portion positioned on a leading side in a rotational direction, and a second end portion positioned on a trailing side in the rotational direction; the hole in which the first end portion is open has an inner space and a first outer space that communicates with the inner space, has the first end portion as one end portion of the hole in a left and right direction, and is wider than the inner space; and the first end portion is disposed off-center on the trailing side in the rotational direction relative to a circumferential direction center position of the inner space at the position where the inner space communicates with the first outer space.