A film forming method for forming a film including arranging a liquid composition on a substrate and drying the liquid composition, the liquid composition being obtained by dissolving a functional material in a solvent with a plurality of species of liquid mixed therein, is provided. The method includes: a) firstly reducing a pressure surrounding the liquid composition arranged on the substrate at a first depressurizing speed; b) increasing the pressure surrounding the liquid composition to a predetermined pressures after the step a); and c) secondly reducing the pressure surrounding the liquid composition at a second depressurizing speed, after the step b).