A display device for a gaming machine according to an embodiment of the present invention includes: a display panel configured to display images for a game; a shutter assembly configured to cover and uncover the display panel at least in part, the shutter assembly including a first sliding door configured to move along a first guide and a second sliding door configured to move along a second guide; and a driving unit configured to drive the first sliding door, wherein the shutter assembly is configured to make friction between the second sliding door and the second guide greater than friction between the first sliding door and the first guide.