An antireflection film includes a first layer, a second layer, a third layer, a fourth layer, a fifth layer, a sixth layer, and a seventh layer. Each of the first, third, fifth, and seventh layer is formed using a low refractive index material. Each of the second, fourth, and sixth layer is formed using a high refractive index material. The thicknesses of the first, second, third, fourth, fifth, sixth, and seventh layers are in ranges of 0.122d1 to 3.052d1, 0.267d2 to 0.370d2, 0.427d3 to 0.610d3, 0.760d4 to 0.924d4, 0.305d5 to 0.378d5, 0.575d6 to 0.718d6, and 1.160d7 to 1.342d7, correspondingly, wherein di=λ/(4×ni), (i=1, 2, . . . 7), ni is a refractive index of the i-th layer, and λ is a reference wavelength of incident light entered into the antireflection film.