Abstract: A cleaner for an atomizer for removing the dust by a rapid flow of the liquid. It comprises a cylindrical case having a valve body urged to a valve seat by a spring, and a cylindrical mesh filter fitted around the valve body and the spring. One end of the mesh filter is urged to the valve seat whereas the other end is supported by a spring seat. The rapid liquid flow collides the mesh filter, thereby removing the dust clogging in the mesh filter.