A strobe device according to the present invention includes: a main capacitor; and step-up means including at least one step-up capacitor, the at least one step-up capacitor being rapidly charged via a flash discharge tube in an ionization state, a charged voltage of the at least one step-up capacitor being superimposed on a charged voltage of the main capacitor and applied across the flash discharge tube at least via an insulated gate bipolar transistor and a restriction resistor coupled in series with the flash discharge tube. The resistance value of the restriction resistor is prescribed to satisfy both of the following two conditions:(1) during an OFF state of the insulated gate bipolar transistor, an electric current flowing via the flash discharge tube is controlled at a level where the flash discharge tube cannot continue to discharge; and(2) during an ON state of the insulated gate bipolar transistor, a voltage across the flash discharge tube is stepped up to a voltage which is higher than the charged voltage of the main capacitor when the charged voltage of the step-up capacitor is applied across the flash discharge tube.