The cooking device includes a top plate 2 on which containers 30 are to be placed, heating devices 5L, 5R provided under the top plate 2, electrodes 15, 16, 17 provided on a lower surface of the top plate 2, capacitance detection devices 18, 19, 20 for detecting changes in capacitance of the electrodes 15, 16, 17, and a boil over determination device 31 for determining a liquid boiled over from the containers 30 on the basis of the changes in capacitance detected by the capacitance detection devices 18, 19, 20 in heating operations of the heating devices 5L, 5R. The electrodes 15, 16, 17 have a plurality of arc-shaped detection parts 15a, 16a, 17a provided along periphery of each of the heating devices 5L, 5R.