A totally-enclosed fan-cooled motor comprising: a stator arranged in a frame; a rotor that is attached to a rotation shaft and is arranged to face the stator; a drive side bracket that is arranged at one end of the frame and supports the rotation shaft; a counter drive side bracket that is arranged at another end of the frame and supports the rotation shaft; a pair of bearings (7, 9) that support a drive side and a counter drive side of the rotation shaft; an external fan that is arranged on an outer side of the counter drive side bracket, is mounted on the rotation shaft, and sends cooling air from an outside to the stator; an internal fan that is arranged in the frame and sends air in the motor to the rotor and the stator by circulating the air; a disk-shaped heat radiator (17; 22; 23) that is arranged on an outer side of the drive side bracket and is mounted on the rotation shaft; characterised by a cover adapted to sealingly cover a joint and protect the joint from snow, the joint being adapted to connect the rotation shaft extending to an outer side of the drive side bracket of the motor and a reduction gear; a first ventilation path that guides part of the cooling air taken in from the external fan to the drive side bracket without contacting the frame; and a second ventilation path that is arranged between the drive side bracket and an end of the cover, communicates with the first ventilation path to receive the cooling air from the first ventilation path, and includes an outlet, wherein the cooling air passed through the first ventilation path passes the heat radiator (17; 22; 23), and the cooling air and heat from the heat radiator (17; 22; 23) are adapted to be discharged, via the outlet, outside the motor. a stator arranged in a frame; a rotor that is attached to a rotation shaft and is arranged to face the stator; a drive side bracket that is arranged at one end of the frame and supports the rotation shaft; a counter drive side bracket that is arranged at another end of the frame and supports the rotation shaft; a pair of bearings (7, 9) that support a drive side and a counter drive side of the rotation shaft; an external fan that is arranged on an outer side of the counter drive side bracket, is mounted on the rotation shaft, and sends cooling air from an outside to the stator; an internal fan that is arranged in the frame and sends air in the motor to the rotor and the stator by circulating the air; a disk-shaped heat radiator (17; 22; 23) that is arranged on an outer side of the drive side bracket and is mounted on the rotation shaft; characterised by a cover adapted to sealingly cover a joint and protect the joint from snow, the joint being adapted to connect the rotation shaft extending to an outer side of the drive side bracket of the motor and a reduction gear; a first ventilation path that guides part of the cooling air taken in from the external fan to the drive side bracket without contacting the frame; and a second ventilation path that is arranged between the drive side bracket and an end of the cover, communicates with the first ventilation path to receive the cooling air from the first ventilation path, and includes an outlet, wherein the cooling air passed through the first ventilation path passes the heat radiator (17; 22; 23), and the cooling air and heat from the heat radiator (17; 22; 23) are adapted to be discharged, via the outlet, outside the motor.