The utility model provides a motor, in this motor, the casing has: keep the stator and have the cylindric casing of opening at the upside, and install in the upside of casing to cover the motor cover of the upside of stator. The busbar unit has: with the electric sensor busbar of being connected of turn sensitive device, and be located the opening and keep the busbar holder of sensor busbar. The casing has to outside open -ended casing perforating hole. The busbar holder has: at least a part of cylindric holder main part that is located the radial inboard of opening, the outside of exposing the casing, and at least a part of portion of exposing that is located the casing perforating hole. Be provided with the clearance between portion of upwards exposing in week and casing perforating hole. The utility model discloses can adjust the relative position of turn sensitive device for sensor magnet when equipment motor.