PURPOSE: To additionally heat against insufficient heat merely by pushing an additional heat start switch separately provided in a high frequency heating device by recording the additional content for supplementing the insufficient heat in addition to the original heating content on a cooking card.

CONSTITUTION: When a cooking card 9 recording heating contents is inserted into a reader 8, a microcomputer 1 stores the heating contents A and a in the addresses b and c of a RAM1-4 by the operation of a ROM1-3 and displays the contents on a display unit 6. When a switch 7-2 is depressed, heating operation is started on the basis of the original heating content A. When the heating is insufficient on the food, if the switch 7-3 is depressed, the heating operation is started on the basis of the heating content a stored in the address c and the content is displayed on the display unit 6.