A display device includes a display panel which displays an image with light, a backlight unit which generates and provides the light to the display panel, and a polarizer which is coupled to the display panel and includes a polarizing film to polarize the light. The polarizing film includes a base film defining a first optical surface thereof from which first grooves are defined recessed and a second optical surface thereof which opposes the first optical surface and from which second grooves are defined recessed; a polarizing layer including the first grooves recessed from the first optical surface; and a light blocking layer including the second grooves recessed from the second optical surface.