An electronic camera device according to the first aspect of the present invention comprises a battery which supplies a power supply, a detector which detects a state of the power supply of the loaded battery, a flash device configured to illuminate a subject, a charge controller which controls a charge processing of charging an energy supplied to the flash device, a processing part which executes at least one processing requiring an electric power more than a predetermined value except a charge processing, and a part configured to execute the charge processing and at least one processing each unit of a predetermined processing by timesharing while keeping the electric power supplied by the battery to maximum.