A solution is characteristic in being an etching method that processes a surface of a target object by corroding the surface by a corrosive, and the etching method includes: a resist forming step of forming a resist on the surface using resist liquid by ink jet printing the resist liquid on the surface; a surface corroding step of corroding a portion of the surface where the resist is not formed by bringing the corrosive into contact with a surface side of the target object where the resist has been formed in the resist forming step; and a resist detaching step of detaching the resist from the surface after the surface corroding step, wherein the resist forming step is a step of forming the resist by the resist liquid containing monofunctional monomers or monofunctional oligomers, and polyfunctional monomers or polyfunctional oligomers.