An electronic induction heating cooker, comprising: a rectifier configured to rectify an input voltage into a direct current voltage and output the DC voltage; an inverter including first, second and third switches (S1, S2, S3) connected in series between a positive power source terminal and a negative power source terminal and configured to generate an alternating current voltage by switching the DC voltage; a first heater driven by the AC voltage to generate heat for heating a first cooking container; a second heater connected in parallel to the first heater and driven by the AC voltage to generate heat for heating a second cooking container; and a switching controller configured to generate a switching signal for controlling the first and second heaters (230, 240) in accordance with a set of operating conditions input thereto, and to adjust a duty cycle of the switching signal in response to an adjustment in the operating conditions, wherein the set of operating conditions comprises: an operation mode condition for designating one of a plurality of operation modes for the first and second heaters (230, 240); and an output power condition for determining output powers of the first and second heaters (230, 240), wherein the plurality of operation modes comprises: a first operation mode for driving only the first heater; a second operation mode for driving only the second heater; a third operation mode for simultaneously driving both the first and second heaters (230, 240); and a fourth operation mode for alternately driving the first and second heaters (230, 240), wherein the switching signal controls the first, second and third switches (S1, S2, S3) to be open or closed corresponding to the designated one of the plurality of operation modes, and wherein the switching controller is configured to adjust "ON" and "OFF" periods of the switching signal based on the determined output powers. a rectifier configured to rectify an input voltage into a direct current voltage and output the DC voltage; an inverter including first, second and third switches (S1, S2, S3) connected in series between a positive power source terminal and a negative power source terminal and configured to generate an alternating current voltage by switching the DC voltage; a first heater driven by the AC voltage to generate heat for heating a first cooking container; a second heater connected in parallel to the first heater and driven by the AC voltage to generate heat for heating a second cooking container; and a switching controller configured to generate a switching signal for controlling the first and second heaters (230, 240) in accordance with a set of operating conditions input thereto, and to adjust a duty cycle of the switching signal in response to an adjustment in the operating conditions, an operation mode condition for designating one of a plurality of operation modes for the first and second heaters (230, 240); and an output power condition for determining output powers of the first and second heaters (230, 240), wherein the plurality of operation modes comprises: a first operation mode for driving only the first heater; a second operation mode for driving only the second heater; a third operation mode for simultaneously driving both the first and second heaters (230, 240); and a fourth operation mode for alternately driving the first and second heaters (230, 240), wherein the switching signal controls the first, second and third switches (S1, S2, S3) to be open or closed corresponding to the designated one of the plurality of operation modes, and wherein the switching controller is configured to adjust "ON" and "OFF" periods of the switching signal based on the determined output powers. a first operation mode for driving only the first heater; a second operation mode for driving only the second heater; a third operation mode for simultaneously driving both the first and second heaters (230, 240); and a fourth operation mode for alternately driving the first and second heaters (230, 240), wherein the switching signal controls the first, second and third switches (S1, S2, S3) to be open or closed corresponding to the designated one of the plurality of operation modes, and wherein the switching controller is configured to adjust "ON" and "OFF" periods of the switching signal based on the determined output powers.