A display device including a display panel, a first polarizer, a second polarizer, a first phase compensation film, and a second phase compensation film is provided. The first polarizer and the second polarizer are disposed on two sides of the display panel. The first polarizer has a first light-absorption axis, and the second polarizer has a second light-absorption axis. The first phase compensation film and the second phase compensation film are disposed between the first polarizer and the second polarizer. The second phase compensation film obeys a first formula: R ⁢ ⁢ λ1 λ1 > R ⁢ ⁢ λ2 λ2 > R ⁢ ⁢ λ3 λ3 , wherein Rλ1, Rλ2 and Rλ3 are horizontal phase retardation values of the second phase compensation film when wavelengths of lights passing through the second phase compensation film are respectively λ1, λ2 and λ3, and λ1