To miniaturize the construction of a high-voltage power source circuit and to reduce the cost of the power source circuit by making a high-voltage transformer to be one regardless of the number of output terminals TRs in the high-voltage power source circuit respectively applying high voltages to respective transferring rollers of the transferring device of an electronic image forming device by interposing resistances respectively having values of resistivity in accordance with values of resistivity of the respective rollers in series.

This high-voltage power source circuit is constituted by providing a high voltage generating circuit α having a high-voltage transformer T11 and plural voltage output circuits βs which are connected to the output terminal Vo of the high voltage generating circuit α by interposing input resistances R21s respectively having values of resistivity roughly equal to values of resistivity of above described values of resistivity of the rollers in series and whose output voltages are individually and independently controllable respectively by making the voltage in accordance with the value of the output voltage of the circuit α an upper limit value.