A touch panel with a built-in display device has No. 1 sensor lines (120) and No. 2 sensor lines (150), which are both formed by a third conductive film and extend in horizontal and vertical directions, respectively. Therefore, the No. 1 sensor lines (120) are configured by single uninterrupted conductors so as to prevent short-circuit where the No. 1 sensor lines (120) cross the No. 2 sensor lines (150). The No. 2 sensor lines (150) are configured by pairs of conductors (151, 152) separated by spaces (SP), so as to sandwich the No. 1 sensor lines (120) therebetween. In addition, pad portions (370) are provided above the spaces (SP), so as to electrically connect the pairs of conductors (151, 152) of the No. 2 sensor lines (150). In this manner, the touch panel with a built-in display device is provided capable of preventing short-circuit of wiring conductors formed in the same layer, thereby increasing the degree of freedom in wiring layout.