A display device having an electrostatic discharge protection unit disposed between a display unit and a pad unit. The electrostatic discharge protection unit comprises a first signal line configured to deliver data and a control signal from a pad unit to the display unit, a second signal line, a plurality of first electrostatic discharge protection patterns which are electrically connected to the first signal line; and a plurality of second electrostatic discharge protection patterns which are electrically connected to the second signal line. Respective ones of the first electrostatic discharge protection patterns and the second electrostatic discharge protection patterns together form a plurality of electrostatic discharge protection pattern pairs, and the first and second electrostatic discharge protection patterns in each of the electrostatic discharge protection pattern pairs are separated from each other by differing distances.