A display device includes: a display panel including a first area, a second area including an alignment mark, and a bending area disposed between the first and second areas and bent such that the second area is disposed under the first area; a heat radiating layer disposed between the first area and the second area; a spacer disposed between the heat radiating layer and the second area; and a light-blocking tape disposed between the heat radiating layer and the spacer and extending outside an edge of the spacer when viewed on a plane. The alignment mark overlaps the light-blocking tape when viewed on the plane.