A display device according to the present invention is provided with: a display panel that has a display area and a non-display area; a plurality of signal lines that are provided on the display panel; a spare wire (40) that extends to the non-display area and the outside of the display panel and that should be connected to the signal lines; a plurality of connection terminals that are provided on the display panel; and amplifiers (7) that are connected, at input sides thereof, to first connection terminals (21), that should be connected, at output sides thereof, to the spare wire (40), and that are located outside the display panel. The display device is characterized in that: the spare wire (40) has divided first spare-wire sections (411 and 421) and a second spare-wire section; and the display device is provided with a connection section (4) that is connected to ends of the first spare-wire sections (411 and 421) and that should be connected to other signal lines; first connecting lines (61) that are connected to the output sides of the amplifiers (7), that extend from the outside of the display panel to the non-display area, and that are connected to second connection terminals (22); and second connecting lines (62) that should connect fourth connection terminals (24) to the second connection terminals (22) or third connection terminals (23).