Disclosed is a display device for maximizing the possibility that an after image is formed in a rollable display, including a housing, a guide bar accommodated in the housing and configured to rotate, a display configured to be drawn out from the housing along with rotation of the guide bar and to be retracted into the housing, and a controller configured to display the display content in a region of the display, which is drawn out from the housing, in which a draw-out length of the display that is partially drawn out from the housing is variable.