A high voltage output device in accordance with the present invention, which comprises a transformer that amplifies a voltage being fed to a primary side coil thereof so as to be produced from a secondary side coil thereof, and in which an alternate current input voltage is fed from the primary side coil, and an output voltage is taken out from the secondary side coil, further comprises a feedback circuit that feeds back the output voltage, and a voltage amplifying circuit that amplifies the voltage being fed back so as to be fed to the primary side coil. As a result, it is possible to provide such a high voltage output device as can obtain an output voltage efficiently, although a load capacity on a secondary side of a transformer fluctuates.