PURPOSE: To provide a wiring board easy to be bent when it is to be accommodated in a case or the like, a light emitting diode array equipped with this wiring board, an illuminator using this array, and others.

CONSTITUTION: These are a wiring board 1, which is equipped with bending planed sections 7 and 7a being made along the conductor pattern 4a, etc., made on a flexible insulating substrate 2, a light diode array, where a plurality of diode pellets are junctioned with each other through conductive binders 3 on the conductive pattern 4a, etc., of this wiring board 1, an illuminator, which accommodates this array inside a case, and a pointer. Accordingly, even if the insulating substrate is bent, strong stress or breaking force is not applied to members or junctions between members, and the exfoliation, break, or chipping of members can be prevented. Moreover, the bending processing is easy and work efficiency is excellent at mounting on equipment, and also the life of equipment using this insulating substrate can be elongated.