A hybrid power device is formed of a normally-on type SiC-JFET and a normally-off type Si-MOSFET, which are connected in cascode with a source of the SiC-JFET and a drain of the Si-MOSFET being connected to each other thereby forming a hybrid power FET. A gate of the SiC-JFET and a source of the Si-MOSFET are connected via a switching speed regulating resistor. A capacitor is connected to the switching speed regulating resistor in parallel to control a switching speed to a first speed in a former part of the switching period of the hybrid power FET and to a second switching speed in a latter part of the switching period. The second switching speed is lower than the first switching speed.