PROBLEM TO BE SOLVED: To provide an agricultural house film which can maintain a COconcentration required for photosynthesis of a plant without ventilation and an agricultural house prepared therewith.SOLUTION: An agricultural house film is a cellulose film that comprises cellulose acylate resin, has an equilibrium moisture content at 25°C and relative humidity 80% of 4-8%, and has a thickness of 60-200 μm.SELECTED DRAWING: None