<p>Provided is a method for treating a substrate which comprises: a step in which a film is formed on the top surface of a substrate (10) by causing a non-corrosive liquid to flow down in film form onto the substrate (10); and a step in which the substrate (10) is conveyed through droplets (18) which surround the substrate (10), with the film having been formed on the top surface of the substrate (10) as a corrosion-resistant film. As a result, it is possible to prevent partial corrosion of the substrate (10) when the substrate (10) is being conveyed through a corrosive liquid surrounding the substrate (10) such that the substrate (10) is not treated by the liquid.</p>
