Cooker

A cooker comprising:

• a heating chamber in which an object to be heated is placed on a placing table used also as a bottom surface;
• a detachable heating pan which is detachably provided inside the heating chamber and on which an object to be heated is placed which is different from the object to be heated;
• a high-frequency wave supply unit which generates microwaves;
• an antenna which radiates the microwaves generated by the high-frequency wave supply unit;
• an operation unit which receives information on heating treatment of an object to be heated;
• and
• a control unit which controls the heating treatment of the object to be heated on the basis of the information on the heating treatment obtained from the operation unit,
• wherein the control unit controls an orientation of a portion of the antenna having high radiation directivity on the basis of the information, which is received from the operation unit, on the heating treatment of a first object to be heated placed on the placing table used also as the bottom surface of the heating chamber and a second object to be heated placed on the heating pan, and stops the operation after heating of the first and second objects to be heated is completed.