A ventilator (100) includes a frame (10), a volute (20) mounted in the frame (10), a motor bracket (60) mounted in the opening of the volute (20) and a motor (30) fitted in the motor bracket (60). The frame (10) is made of metal material. The character of the ventilator is in that the motor bracket (60) is made of metal material. Since the metal motor bracket has favorable performances of heat radiation and rigidity, the ventilator (100) has better security and stability.