A dishwasher according to an embodiment includes a tub; a door for covering the opening of the tub; a door-driving unit for driving the door; a temperature sensor for detecting the internal temperature of the tub; a drying device for supplying heated air into the tub; and a control unit for controlling the door-driving unit, the temperature sensor and the drying device, wherein the control unit operates the drying device in order to perform drying, and controls the door-driving unit so as to perform a door opening/closing operation at least once on the basis of whether the internal temperature of the tub reaches multiple preset temperatures during drying.