PURPOSE: To drive a horizontal deflection coil or the like for television screen with a current of a smooth waveform not affected by a gate voltage of a drive transistor(TR).

CONSTITUTION: The coil drive circuit comprising a voltage resonance circuit 30 including a high inductance coil 10 and a capacitor 20, a flywheeling diode 40 for a current of a coil connected in parallel with the circuit 30, and a drive transistor(TR) 50 turned on/off for a prescribed period to supply a current to the coil is provided with an auxiliary current circuit 70 to supply an auxiliary current Ia different from a current I flowing to the TR 50 from the resonance circuit 30, then the current jump by a gate voltage is finished by the auxiliary current Ia supplied to the drive TR 50 before a current Id is switched to the current I when the flywheeling operation of the diode 40 is finished and the current I just after the changeover, that is, a coil current IL is smoothly risen without jumping of the coil current IL.