To provide a reverse type multioutput DC power unit which is high in stability of output voltage and is small and low cost.

This reverse type multioutput DC power unit stores energy as magnetic flux in the magnetic core of a transformer through the primary winding of the transformer during on-time of a switching element, next discharges the energy stored as magnetic flux in the magnetic core of the transformer during off-time of the switching element to a secondary circuit through the secondary winding of the transformer, rectifies the energy discharged from the transformer into a pulse-form current by a rectifying element, and smoothes the rectified pulse-form current by a smoothing capacitor, thereby getting desired DC voltage, and has two or more outputs so that a high-voltage output circuit excluding a circuit the lowest in output voltage has a plurality of current loops with respect to an output circuit.