To provide a method for producing a three-dimensional hydraulic material mixture molding having a complex shape and a pattern which can be used without being coated.

In a method for producing a hydraulic inorganic molding in which a hydraulic material mixture of a hydraulic material, aggregate, a thickener, and water is placed in a form, pressurized, molded in a prescribed shape, and demolded, before the mixture being placed in the form, a thermoplastic resin film is arranged on at least one surface among surfaces which contact the mixture in the form, and the mixture is demolded so that the film is adhered to the surface of the hydraulic inorganic molding.