An active-matrix liquid crystal display device comprising a first substrate including a display area and on which a plurality of pixel formation portions (P(n,m)) for forming an image to be displayed are arranged in a matrix, a second substrate opposed to the first substrate, and a liquid crystal layer sealed between the first and second substrates by a predetermined seal material, wherein the first substrate includes: a plurality of video signal lines for transmitting signals to represent the image to be displayed; a plurality of scanning signal lines crossing the video signal lines; a plurality of auxiliary capacitance lines (CsL); an auxiliary capacitance trunk line provided so as to extend in an arrangement direction of the auxiliary capacitance lines (CsL) and electrically connect to the auxiliary capacitance lines (CsL); and a scanning signal line driver circuit including a group of circuits (410, 413) for selectively driving the scanning signal lines, and at least a part of the auxiliary capacitance trunk line includes trunk lines provided between the scanning signal line driver circuit and an edge of the first substrate that is opposite to the display area with respect to the scanning signal line driver circuit, characterized in that the auxiliary capacitance lines extend in parallel with the scanning signal lines wherein the auxiliary capacitance trunk line includes: a first auxiliary capacitance trunk line provided between the scanning signal line driver circuit and the display area; and a second auxiliary capacitance trunk line provided between the scanning signal line driver circuit and the edge of the first substrate that is opposite to the display area with respect to the scanning signal line driver circuit; the display device further comprising a drive-signal-supply trunk line for transmitting a drive signal to drive the scanning signal line driver circuit, the drive-signal-supply trunk line being provided so as to extend in the arrangement direction between the second auxiliary capacitance trunk line and the scanning signal line driver circuit. a plurality of video signal lines for transmitting signals to represent the image to be displayed; a plurality of scanning signal lines crossing the video signal lines; a plurality of auxiliary capacitance lines (CsL); an auxiliary capacitance trunk line provided so as to extend in an arrangement direction of the auxiliary capacitance lines (CsL) and electrically connect to the auxiliary capacitance lines (CsL); and a scanning signal line driver circuit including a group of circuits (410, 413) for selectively driving the scanning signal lines, and at least a part of the auxiliary capacitance trunk line includes trunk lines provided between the scanning signal line driver circuit and an edge of the first substrate that is opposite to the display area with respect to the scanning signal line driver circuit, characterized in that the auxiliary capacitance lines extend in parallel with the scanning signal lines wherein the auxiliary capacitance trunk line includes: a first auxiliary capacitance trunk line provided between the scanning signal line driver circuit and the display area; and a second auxiliary capacitance trunk line provided between the scanning signal line driver circuit and the edge of the first substrate that is opposite to the display area with respect to the scanning signal line driver circuit; the display device further comprising a drive-signal-supply trunk line for transmitting a drive signal to drive the scanning signal line driver circuit, the drive-signal-supply trunk line being provided so as to extend in the arrangement direction between the second auxiliary capacitance trunk line and the scanning signal line driver circuit. a first auxiliary capacitance trunk line provided between the scanning signal line driver circuit and the display area; and a second auxiliary capacitance trunk line provided between the scanning signal line driver circuit and the edge of the first substrate that is opposite to the display area with respect to the scanning signal line driver circuit; the display device further comprising a drive-signal-supply trunk line for transmitting a drive signal to drive the scanning signal line driver circuit, the drive-signal-supply trunk line being provided so as to extend in the arrangement direction between the second auxiliary capacitance trunk line and the scanning signal line driver circuit.