To provide a liquid crystal display device capable of reducing an EMI (electromagnetic interference) phenomenon by properly adjusting intervals among signal lines.

In this display device, a plurality of gate lines and a plurality of data lines which extend respectively in a row direction and a column direction are formed on a substrate and in each pixel area which is demarcated by the gate line and the data line, a switching element and a pixel electrode which is connected to the switching element are provided. Moreover, a plurality of gate driving circuits and a plurality of data driving circuits and a differential signal wiring part to which timing controllers of the data driving circuits and a printed circuit board are to be connected is provided on the substrate. The interval (D) between signal lines 131, 132 being a differential relation in signal lines 131, 132, 133, 134 of the differential signal wiring part is made smaller than the line width (W) of the signal line and an interval (P) between the signal lines 132, 133 which are not in the differential relation. When intervals among signal lines and the width of the signal line satisfy such a relation, the EMI phenomenon to be generated in the signal lines is reduced.