An optical film in which a function of a brightness enhancement film is maintained and variations in brightness and chromaticity within a film plane are suppressed is provided. An optical film is a laminate of an absorptive dichroic polarizing plate and a brightness enhancement film. A maximum chromaticity difference xy(max) of in-plane transmitted light is 0.008 or smaller after the optical film is attached to a glass plate and allowed to stand at 70 C. for 120 hours. The brightness enhancement film includes a layer having a circularly polarized light separating function, and a quarter wavelength plate. The quarter wavelength plate is a film showing an in-plane retardation (nd) satisfying nd(450 nm)/nd(550 nm)1.02 or a film containing a polymer having a photoelastic coefficient of 4010^-12 m²/N or smaller.