A heating device includes a main body with an opening, a magnetron for generating electromagnetic waves for heating, a door for putting in and taking out an object to be heated, a reader, and a barrier. The magnetron emits electromagnetic waves into the main body. The door covers the opening of the main body. The reader reads information contained in a wireless IC tag attached to the object to be heated. The barrier acts a shield for the reader from the electromagnetic waves emitted by the magnetron when the door is closed, and the shield is broken when the door is opened.