To prevent overcharge or power consumption at the time of stand-by, and to protect the rated voltage of a main capacitor.

This stroboscope device is provided with the main capacitor 7 to feed power to a flash generating means 8, charging means 2-4 and 6 to convert pulse voltage fed to the input side into DC high voltage to be outputted for charging the main capacitor, a pulse power source means 1 to feed the pulse voltage to the charging means, and a voltage detecting means 5 to detect charged voltage in the charging means. It is also provided with a control means 9 to control pulse interval of the pulse voltage outputted from the pulse power source means in accordance with the voltage detected by the voltage detecting means.