To provide a coated number plate hard to occur the peeling of the coated film from the end edge even if the number plate is coated only on the surface, and an electrostatic coating apparatus for coating the number plate.

The electrostatic coating apparatus consists of an earthed belt conveyor comprising annular belts 58, 59 which are parallelly provided at a predetermined interval and have a large number of sharp support pins 6 comprising a conductor fixed on the outer surfaces thereof so that the sharp ends 61 thereof are turned outwardly and feeds the plate-shaped object W placed between the parallel annular belts 58, 59 through the support pins 6, a powder supply apparatus 2 for supplying powder paint from a supply port 21, a spray gun 4 provided with a charge cylinder 42 connected to the supply port 21 through a supply pipe 3 to charge the powder paint and provided with the spray nozzle 42 extended from the charge cylinder and a nozzle moving device 7 for reciprocally moving the spray nozzle 4 in the direction crossing the belt conveyor 5.