A display panel includes a display area, in which a plurality of pixels is arranged and a plurality of peripheral areas surrounding the display area. The display panel includes a first substrate, a second substrate disposed opposite to the first substrate, a first external signal line disposed on the first substrate in a first peripheral area of plurality of peripheral areas and connected to an external device, and a first through-hole terminal including a conductive material filled in a hole defined through the first substrate in an area in which the first external signal line is disposed.