Disclosed is a display device having a display panel wherein the display device includes a plurality of gate lines and a plurality of data lines crossing each other to define a plurality of pixels in the display panel, each pixel being divided into N number of sub-pixel areas including a 2D sub-pixel and a 3D sub-pixel, wherein N is an integer and greater than 1; and a lenticular film including a plurality of lenses and attached to the display panel, wherein 3D sub-pixels on an odd-numbered horizontal line and 3D sub-pixels on an even-numbered horizontal line are alternately arranged on a line-by-line basis in a vertical direction.