A display device is provided. The display device includes a first substrate, a second substrate, a base layer, a first shielding layer, and a first optical adjustment layer. The second substrate has a third surface and a fourth surface. The base layer is disposed between the first substrate and the second substrate. The first shielding layer is disposed between the first substrate and the base layer and defines a first shielding region and a first non-shielding region. The first optical adjustment layer is disposed between the first shielding layer and the second substrate. The thickness of the first optical adjustment layer is in a range from 1 μm to 3 μm. The reflectance of the first optical adjustment layer is in a range from 0.05% to 1.2%.