An active matrix display device is equipped with: a first auxiliary wiring line (700) that intersects a second common wiring line (230) through an insulation film, and that intersects with any of a plurality of first connecting wiring lines (900) through an insulating film; and a second auxiliary wiring line (710) that intersects, across an insulation film, any of a plurality of redundant portions (101), which are the other end portions of each of a plurality source wiring lines (100) and are located outside of a display region (60), and that, in a plan view, is positioned outside of a plurality of second lead-out wiring lines (250) and a first driver circuit, and is capable of being connected electrically to the second common wiring line (230). On each of the plurality of first connecting wiring lines (900), a plurality of intersections (901), where the first auxiliary wiring line (700) and the plurality of first connecting wiring lines (900) intersect, are located closer to the side of a plurality of source terminals (110, 120) than first obstructing portions.