The present invention relates to a cooking appliance comprising: a cabinet defining a cooking chamber； a heating means installed on the cabinet and formed so as to heat the inside of the cooking chamber； an air pump installed on an outer side extends into the cooking chamber； a cooking pack arranged selectively inside the cooking chamber and formed so as to accommodate an object to be cooked； and a control unit for controlling the heating means and the air pump, wherein one side of the cooking pack is detachable from a free end of the tube. According to the present invention, sous vide cooking is enabled by, within a single plate, vacuum treating the space where the object to be cooked is accommodated and controlling the temperature inside the cooking chamber during cooking.
