Electric flash device

An electronic flash device comprising a flash unit having electric power supply means including a direct current voltage power source, means for boosting voltage of said direct current power source and for storing electric energy, flash light generating member including a flash tube generating flash light, trigger signal generating means triggering said flash light generating member, and means for stopping flash of said flash light generating member when flash light quantity of said flash light attains to a predetermined value, and a flash control unit having light receiving means for receiving a reflecting light which is produced from said flash tube and is reflected from an object to be photographed, flash light quantity detecting means for detecting flash light quantity of said flash light generated from the flash tube by means of comparing an electric value obtained by integrating output of said light receiving means with reference voltage, means for indicating light exposure quantity in response to a plurality of outputs of said flash light quantity detecting means, and flash light quantity control means for controlling said flash light quantity of said flash light, said flash unit further comprising a voltage generating member applying voltage to said light receiving means and said flash light quantity detecting means of the flash control unit, and said flash control unit further comprising means for maintaining operation of said indicating means during a predetermined time interval.