To provide a coating nozzle for liquid capable of forming a uniform coating film with a small quantity of a coating liquid on a circular surface, preventing the physical staining in the forming process and processing for a shorter time.

In the coating nozzle 30 for liquid having a thin plate like space part 42 for housing the liquid inside and a discharge port 36 structured by opening the end part of the space part 42 outside, a feed port 46 for feeding the liquid to the space part 42 and a 1st suction port 50 arranged almost at both end parts of the space part 42 and formed by drawing both end parts of the tip directing a discharge port 36 for the liquid into the space part 42 are provided.