PURPOSE:To eliminate the trouble that it is necessary to replace a battery frequently or that it takes a long time to charge a battery or the like, and to facilitate the maintenance related, to the power supply of a guide light, and to improve the function of a guide light such as water-proof sealing property. CONSTITUTION:An instantaneous charge type guide light has a power capacitor C, which is built in a portable guide light main body provided with a light emitting lamp 7, and charging terminals 3a, 3b, which are connected to this power capacitor C and provided in the guide light main body 1. Power is supplied from the outside through these charging terminals 3a, 3b to charge the power capacitor C instantaneously, and the light emitting lamp 7 is driven for lighting by discharging the electric charge stored in the power capacitor C.