Provided is a configuration of a display device that can have a narrower frame. A display device (1) includes a first display unit (11) including a first substrate (111); a second display unit (12) including a second substrate (121) that is arranged so as to be adjacent to the first substrate (111) in an in-plane direction of the first substrate (111); a first line group (1171) that supplies a signal to the first display unit (11), the first line group (1171) passing through between the first substrate (111) and the second substrate (121); and a second line group (1271) that supplies a signal to the second display unit (12), the second line group (1271) passing through between the first substrate (111) and the second substrate (121). The first display unit (11) includes a mounting area to which the first line group (1171) is connected, in a part that is opposed to the second display unit (12), and the second display unit (12) includes a mounting area to which the second line group (1271) is connected, in a part that is opposed to the first display unit (11).