An induction heating cooker includes a boiling over detecting portion that reduces the heating output of an inverter to a predetermined value when a change amount of an electrostatic capacitance detected by a capacitance detecting portion with respect to a reference value is equal to or greater than a threshold value. The boiling over detecting portion stops a heating action or reduces the heating output to a third set value lower than a second set value when a change rate of the capacitance is equal to or greater than a predetermined change rate, and maintains the heating output at the second set value when the change rate of the capacitance is less than the predetermined change rate, during a boiling over determining period started from the time that the change amount of the capacitance with respect to the reference value is equal to or greater than the output reducing threshold value.