To provide a coating nozzle in which many minute discharge holes which have been hardly achieved by the conventional working method can be formed with high precision and at a low cost and by which a high quality coating can be performed on a high definition compatible substrate without causing coating defects.

A coating nozzle is used for applying a coating liquid to an object to be coated. A plurality of discharge holes which are formed on a nozzle body for discharging the coating liquid, comprise: prepared holes formed by penetrating the nozzle body; and a coating layer for covering the inner surfaces of the prepared holes. The opening area of the discharge hole is ≤0.03 mm². The thickness of the coating layer is 5-500 μm. The ratio of the depth of the discharge hole to the opening size thereof is ≥3.