An induction heating device , comprising: an indicator (1, 500, 500-1) that is driven by being associated with a working coil (WC) provided in an induction heating device , comprising: a magnetic flux sensing coil configured to sense a magnetic flux generated when driving the working coil (WC) and to convert the sensed magnetic flux into a current; a rectifying portion configured to rectify the current converted in the magnetic flux sensing coil ; and a light emitting module configured to emit a light by receiving the rectified current from the rectifying portion , wherein a magnitude of the current converted in the magnetic flux sensing coil is varied according to a magnitude of the magnetic flux generated in the working coil (WC), and a brightness of the light emitting module is determined automatically according to the magnitude of the current converted in the magnetic flux sensing coil ; characterized by a working coil portion comprising first and second working coils (WC1, WC2); the magnetic flux sensing coil being disposed on the first and second working coils (WC1, WC2) and configured to sense a magnetic flux that is generated when driving at least one of the first and second working coils (WC1, WC2) to convert the sensed magnetic flux into a current. an indicator (1, 500, 500-1) that is driven by being associated with a working coil (WC) provided in an induction heating device , comprising: a magnetic flux sensing coil configured to sense a magnetic flux generated when driving the working coil (WC) and to convert the sensed magnetic flux into a current; a rectifying portion configured to rectify the current converted in the magnetic flux sensing coil ; and a light emitting module configured to emit a light by receiving the rectified current from the rectifying portion , wherein a magnitude of the current converted in the magnetic flux sensing coil is varied according to a magnitude of the magnetic flux generated in the working coil (WC), and a brightness of the light emitting module is determined automatically according to the magnitude of the current converted in the magnetic flux sensing coil ; characterized by a magnetic flux sensing coil configured to sense a magnetic flux generated when driving the working coil (WC) and to convert the sensed magnetic flux into a current; a rectifying portion configured to rectify the current converted in the magnetic flux sensing coil ; and a light emitting module configured to emit a light by receiving the rectified current from the rectifying portion , wherein a magnitude of the current converted in the magnetic flux sensing coil is varied according to a magnitude of the magnetic flux generated in the working coil (WC), and a brightness of the light emitting module is determined automatically according to the magnitude of the current converted in the magnetic flux sensing coil ; a working coil portion comprising first and second working coils (WC1, WC2); the magnetic flux sensing coil being disposed on the first and second working coils (WC1, WC2) and configured to sense a magnetic flux that is generated when driving at least one of the first and second working coils (WC1, WC2) to convert the sensed magnetic flux into a current. <EOS>