The present invention provides a pulse power generator using a semiconductor switch, which enables its lifespan to be significantly improved, allows for its miniaturization, and makes it possible to diversely control a high-voltage pulse output finally. According to the pulse power generator, it is possible to address and solve a difficulty in driving the semiconductor switch in series, i.e., the problems related to synchronization and insulation of a driving power supply, and to include a circuit which can cope with the generation of arc and short circuit to thereby significantly improve device protecting performance and stability of the pulse power generator.