To provide a permanent-magnet motor tester capable of accurately measuring the temperature of a permanent magnet installed in a rotor core in a production process for a motor.

The tester includes a work holder on which a permanent-magnet motor 50 is set as a motor to be tested, and a planetary gear 21 having a ring gear 24 rotated by a measuring part rotating motor 12. In the tester, the ring gear 24 is advanced with the number of revolutions of the permanent-magnet motor 50 in agreement with the number of revolutions of the ring gear 24. Thus, the temperature measuring element 28 provided on the ring gear 24 is brought into contact with end faces of permanent magnets 65a to 65h to measure the temperature of the permanent magnets 65a to 65h. Since the temperature of the permanent magnets 65a to 65h is directly measured with the temperature sensor 28a of the temperature measuring element 28, the temperature can be accurately measured without being affected by the external atmosphere.