The present invention provides an optical film that includes i) an acryl resin, and ii) 20 to 65 parts by weight of a core-shell type graft copolymer that includes a core having a rubber component and a shell including a polymer having a weight average molecular weight that is the same as or higher than a weight average molecular weight of a polymer constituting the i) acryl resin based on 100 parts by weight of the acryl resin, a retardation film, and an electronic device including the same.