A magnetic-geared electric rotary machine according to the present invention is provided with: a casing; a stator having a stator core, coils, and a stator magnet provided on the inner side of the stator core; a first rotor having pole pieces provided on the inner side of the stator; a second rotor having a rotor core provided on the inner side of the first rotor and a plurality of rotor magnets provided in the rotor core in a manner spaced apart from each other in the circumferential direction; a plurality of movable bearings that are provided on the casing, that abut against an outer circumferential surface of at least one of the first rotor and the second rotor, and that are arranged in a manner spaced apart from each other in the circumferential direction; and an actuator for moving these movable bearings in a direction including a plane orthogonal to an axial line.
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