A display device may include first and second base substrates, a pixel, a signal line, a pad electrode, and an electronic circuit connected to the pad electrode. The first base substrate includes a first planar surface and a first side surface, which is connected to the first planar surface and extends in a first direction. The second base substrate includes a second planar surface, which is disposed to face the first planar surface in a second direction crossing the first direction, and a second side surface, which is connected to the second planar surface and extends in the second direction. The pixel is disposed between the first and second base substrates. The signal line is disposed on the first base substrate and connected to the pixel. The pad electrode is disposed on the first side surface and connected to the signal line.