An application nozzle is provided above a rotating object to which an application liquid is to be applied, and in spirally applying the application liquid to the surface of the object by moving the application nozzle, the application liquid is applied flat, smoothly, and uniformly to the surface. A tubular application nozzle (20) has a flat tip surface and is provided above a rotating object (13) to which an application liquid is to be applied. The application liquid (31) is applied from a nozzle hole (21) in the tip of the application nozzle (20) to the surface of the object (13) by moving the application nozzle in the direction intersecting the rotational direction of the object. A tilted cutout (22) is formed in a part of the tip of the application nozzle, and during the application of the application liquid, the rotation of the application nozzle is controlled by a rotation control means (40) so that the cutout in the application nozzle is located on the upstream side of the position at which the application liquid is applied to the rotating object.