To provide a device capable of horizontally conveying, washing, or chemically processing a thin leaf type printed wiring board or copper clad laminate board with ease while preventing any trouble accompanied by horizontal conveyance, washing, or chemical processing of the thin leaf type printed wiring board or copper clad laminate board.

A conveyor for a washing device and a chemical processing device, horizontally conveys the thin leaf type printed wiring board or copper clad laminate board or atomize liquid simultaneously the horizontal conveyance. In a conveyor device, and the washing device and chemical processing device for the printed wiring board or copper clad laminate board with a conveyor, the printed wiring board or copper clad laminate plate is conveyed while having both its side in its traveling direction fixed by continuous beltlike rotary supports from above and below.