According to an aspect, a display device includes: an array substrate comprising a plurality of pixel electrodes; a counter substrate comprising a common electrode in a position at least overlapping the pixel electrodes; a liquid crystal layer between the array substrate and the counter substrate; and a light source disposed so as to emit light into a side surface of the array substrate or a side surface of the counter substrate. The array substrate includes, in a display region: a plurality of signal lines arranged in a first direction with spaces between the signal lines; a plurality of scanning lines arranged in a second direction with spaces between the scanning lines; and common potential wiring provided outside the display region. The counter substrate comprises light-blocking coupling wiring that couples the common electrode to a conductive first power feeding portion.