An optical sheet member includes a polarizing plate including a polarizer (A); an optical conversion member (D); and a brightness enhancement film including a reflection polarizer (B), wherein the brightness enhancement film has a reflection center wavelength range of 300 nm to 430, and the optical conversion member (D) converts a part or all of UV light which is transmitted through polarizer (B) and is incident on the optical conversion member (D), and has an emission center wavelength range of 300 nm to 430 nm and which has an emission center wavelength range of 430 nm to 480 nm, green light which has an emission center wavelength range of 500 nm to 600 nm, and red light which has an emission center wavelength range of 600 nm to 700 nm.