Abstract: Provided are an encapsulation film formed by stacking at least one bilayer including a thin layer composed of graphene oxide or reduced graphene oxide and an organic polymer layer and a method for forming the same. Since the encapsulation film is formed by stacking at least one bilayer including a thin layer composed of graphene oxide or reduced graphene oxide, the encapsulation film can represent an excellent blocking property with respect to oxygen and moisture. Parallel diffusion of the oxygen and the moisture in the encapsulation film may be significantly limited by maximizing a thickness of the organic polymer layer formed between the thin layers.