Abstract:
A wiring board of the present invention includes an insulating board including a core insulating plate and an insulating layer laminated on at least one surface of the insulating plate. A plurality of code information reading pads formed of a conductor layer are disposed on a surface of the insulating layer formed uppermost. A common conductor is disposed oppositely to the code information reading pads by interposing therebetween the insulating layer formed uppermost. At least one of the code information reading pads and the common conductor are electrically connected to each other through a via conductor penetrating through the insulating layer formed uppermost.