An induction heating cooker comprising: a heating coil that induction-heats a target object; high-frequency electric power supplying means for driving the heating coil; conduction control means for controlling the high-frequency electric power supplying means and having at least a "water-boiling mode" and a "boiling mode" as a cooking mode that is selectable by a user; temperature detection means for detecting temperature of the target object; and an operation unit that instructs the conduction control means to perform the cooking mode, wherein the heating coil includes a ring-shaped main heating coil and a plurality of sub-heating coils that are arranged around the main heating coil and that heat, in cooperation with the main heating coil, a target object having a diameter that is greater than a target object having a diameter that is capable of being heated by the main heating coil, wherein in a case where the target object is heated in the "water-boiling mode", the conduction control means is capable of automatically determining heating only by the main heating coil or heating by the main heating coil and the sub-heating coils in cooperation with each other, and wherein in a case where the target object is heated in the "boiling mode" by the main heating coil and the sub-heating coils in cooperation with each other, the conduction control means drives the main heating coil and the sub-heating coils at the same time at a stage before the temperature detection means detects that fluid in the target object is in a boiling state, and drives the main heating coil and the sub-heating coils at specific time intervals at a stage after the temperature detection means detects that the fluid in the target object is in the boiling state. a heating coil that induction-heats a target object; high-frequency electric power supplying means for driving the heating coil; conduction control means for controlling the high-frequency electric power supplying means and having at least a "water-boiling mode" and a "boiling mode" as a cooking mode that is selectable by a user; temperature detection means for detecting temperature of the target object; and an operation unit that instructs the conduction control means to perform the cooking mode, wherein the heating coil includes a ring-shaped main heating coil and a plurality of sub-heating coils that are arranged around the main heating coil and that heat, in cooperation with the main heating coil, a target object having a diameter that is greater than a target object having a diameter that is capable of being heated by the main heating coil, wherein in a case where the target object is heated in the "water-boiling mode", the conduction control means is capable of automatically determining heating only by the main heating coil or heating by the main heating coil and the sub-heating coils in cooperation with each other, and wherein in a case where the target object is heated in the "boiling mode" by the main heating coil and the sub-heating coils in cooperation with each other, the conduction control means drives the main heating coil and the sub-heating coils at the same time at a stage before the temperature detection means detects that fluid in the target object is in a boiling state, and drives the main heating coil and the sub-heating coils at specific time intervals at a stage after the temperature detection means detects that the fluid in the target object is in the boiling state.