PROBLEM TO BE SOLVED: To provide a nozzle cleaning device which prevents mist etc. from adhering to a portion that affects coating performance of a processed body when a member related to wiping of a slit nozzle is cleaned, and to provide a coating applicator, a nozzle cleaning method, and a coating method.SOLUTION: In a nozzle cleaning device, a sealed space L1 is formed and cleaning of a wiping member 41 which wipes to remove deposits 100 of a slit nozzle 30 is conducted in the sealed space L1. Further, a discharge port 491 which discharges vapor-liquid in the sealed space L1 to the outside of the device is provided in the sealed space L1. Thus, a two fluid cleaning liquid WL used for cleaning the wiping member 41 and mist generated by the cleaning are discharged to the outside of the device from the discharge port 491 and do not adhere to an exterior part of the sealed space L1 of a device interior part.SELECTED DRAWING: Figure 12
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