the present invention aims to provide a liquid crystal display device highly suppressing occurrence of rainbow interference pattern in displayed images . the present invention is a liquid crystal display device including : a back light source , a liquid crystal cell , a color filter , a polarizer , and a polarizer protective film arranged in the stated order , wherein the polarizer protective film has a retardation of not less than 6000 nm , and a difference of not less than 0 . 05 between a refractive index in a slow axis direction that is a highest refractive index direction and a refractive index in a fast axis direction that is orthogonal to the slow axis direction , and an absorption axis of the polarizer and the slow axis of the polarizer protective film are arranged to form an angle within a range of 0 °± 30 ° or 90 °± 30 °.