PURPOSE: To provide a coating device enabling the prevention of the increase in various equipment costs and the enlargement of the device appearance in the coating device capable of spraying the treated solution to a work conveyed in a horizontal direction.

CONSTITUTION: A supporting rod 10 holding a work 100 is provided while being extended along the horizontal direction and also so that the work is conveyed while rotating the work 100, the supporting rod 10 is provided movably in the horizontal direction while it is rotated with its axial line as a central and on the other hand the spray nozzle 54 of a spraying means 50 of the treated solution spraying the treated solution for the work 100 is provided on the right over area to the conveying area of the work 100.