To provide a coating nozzle formed with a plurality of ejection holes, preventing cleanability from being deteriorated by taking erosion suppression measures such as a reduction in ultrasonic output and a change of a cleaning solvent in ultrasonic cleaning, and preventing the ejection holes from being damaged by erosion.

A coating nozzle 21 includes: a plurality of ejection holes 26 for ejecting paste formed in a substantially linear row, wherein the coating nozzle has a plurality of uneven portions formed of recessed portions 27 and/or protrusions, the uneven portions are formed in such a manner as to be orthogonal to a row formed of the ejection holes, on a nozzle surface where the plurality of ejection holes are formed, and to form a row almost parallel to the row formed of the ejection holes, within an area held between two straight lines passing through the ejection holes positioned at both ends of the row, and the row formed of the uneven portions comprises the number of uneven portions, equivalent to 90% or more of the number of ejection holes.