Abstract: A pulse power source which can perform high repetition of pulse signals by enhancing the throughput of a pulse source is provided. The pulse power source includes: a charger; an initial-stage capacitor section which is provided with a capacitor charged by the charger; and a magnetic pulse compression circuit which performs magnetic pulse compression of a pulse current generated by discharging a charge from the capacitor at the initial-stage capacitor section and, thereafter, outputs the pulse current. An exposure device which includes the pulse power source is also provided. The pulse power source includes, between the initial-stage capacitor section and the magnetic pulse compression circuit, a transistor which controls timing of discharging a charge from the initial-stage capacitor section, an inductor which constitutes a resonance circuit together with the capacitor at the initial stage capacitor section, and a diode which rectifies the pulse current.