Disclosed herein is a dishwasher. The dishwasher includes a main body, a tub placed within the main body to receive dishes therein, and an air brake mounted to one lateral surface of the tub. The air brake includes a communication hole communicating with the tub to allow air to be introduced into the tub or to be discharged from the tub, a guide rib configured to guide air, introduced through the communication hole, upward of the air brake, and a vent formed in a lateral surface of the air brake to allow air to be discharged outward from the air brake or to allow outside air to be introduced into the air brake, the vent being located below the guide rib to prevent hot air from being discharged from the air brake.