A stretchable display device including a stretchable display to display an image, the stretchable display having a band shape; holes on an outwardly facing surface of the stretchable display; and a stopper on an inwardly facing surface of the stretchable display, the stopper being coupleable with any one of the holes to loop the stretchable display device in a ring form, wherein a size of an image display area of the stretchable display is controllable based on a current value that depends on a position of a hole to which the stopper is coupled.