An induction heating cooker comprising: a top plate in which a heating target object is placed; a plurality of heating coils which are disposed under the top plate and heat the heating target object; an inverter circuit which is provided corresponding to each of the plurality of heating coils and supplies high-frequency current to each of the heating coils; a controller which controls an operation of the inverter circuit; and an operation display which is operated by a user, wherein the inverter circuit includes a switching unit which switches current of a resonance circuit, the controller includes a conduction time detector which detects a conduction period of time of the switching unit, and characterized in that the controller is configured to, in a case where a first heating coil and a second heating coil among the plurality of heating coils are simultaneously operated, and a distance between the first heating coil and the second heating coil is equal to or more than a first predetermined distance, i) in a case where the conduction periods of time of the switching units of a first inverter circuit corresponding to the first heating coil and a second inverter circuit corresponding to the second heating coil are equal to or less than a predetermined value, make driving frequencies of the first inverter circuit and the second inverter circuit be a predetermined driving frequency; ii) in a case where the conduction period of time of the switching unit is longer than the predetermined value, make the driving frequency of the first inverter circuit or the second inverter circuit which has been detected as having the conduction period of time longer than the predetermined value be smaller than the predetermined driving frequency; and inductively heat the heating target object by the first heating coil and the second heating coil. a top plate in which a heating target object is placed; a plurality of heating coils which are disposed under the top plate and heat the heating target object; an inverter circuit which is provided corresponding to each of the plurality of heating coils and supplies high-frequency current to each of the heating coils; a controller which controls an operation of the inverter circuit; and an operation display which is operated by a user, wherein the inverter circuit includes a switching unit which switches current of a resonance circuit, the controller includes a conduction time detector which detects a conduction period of time of the switching unit, and characterized in that the controller is configured to, in a case where a first heating coil and a second heating coil among the plurality of heating coils are simultaneously operated, and a distance between the first heating coil and the second heating coil is equal to or more than a first predetermined distance, i) in a case where the conduction periods of time of the switching units of a first inverter circuit corresponding to the first heating coil and a second inverter circuit corresponding to the second heating coil are equal to or less than a predetermined value, make driving frequencies of the first inverter circuit and the second inverter circuit be a predetermined driving frequency; ii) in a case where the conduction period of time of the switching unit is longer than the predetermined value, i) in a case where the conduction periods of time of the switching units of a first inverter circuit corresponding to the first heating coil and a second inverter circuit corresponding to the second heating coil are equal to or less than a predetermined value, make driving frequencies of the first inverter circuit and the second inverter circuit be a predetermined driving frequency; ii) in a case where the conduction period of time of the switching unit is longer than the predetermined value, make the driving frequency of the first inverter circuit or the second inverter circuit which has been detected as having the conduction period of time longer than the predetermined value be smaller than the predetermined driving frequency; and inductively heat the heating target object by the first heating coil and the second heating coil.