Display device

A display device comprising:

• a display panel having a foldable area, a first non-foldable area disposed on a first side of the folding area, and a second non-foldable area disposed on a second side of the folding area;
• a first stack structure disposed on a first surface of the display panel;
• and
• a second stack structure disposed on a second surface of the display panel,
• wherein
• the first stack structure includes a first layer disposed on the first surface of the display panel, a second layer disposed on the first layer, and a third layer disposed between the first layer and the second layer,
• the second layer has a larger size than the first layer in a plan view, and
• the second layer has a side surface extending outwardly beyond a side surface of the first layer.