To improve sensing sensitivity of a touch panel. A touch panel-attached display device includes an active matrix substrate 1, a counter substrate, and a liquid crystal layer. On the active matrix substrate 1, a TFT (display control element) 42, a first insulating film 44, a plurality of pixel electrodes 31, a second insulating film 46, and a counter electrode 21 are laminated in order. In the active matrix substrate 1, a control unit which detects a touch position by supplying a touch driving signal to a plurality of counter electrodes 21, and a touch sensor wiring 22 which is formed between the first insulating film 44 and the second insulating film 46, which connects the control unit and the counter electrode 21, and which is for supplying the touch driving signal from the control unit to the counter electrode 21, are also formed. A thickness of a portion in the second insulating film 46 formed between the counter electrode 21 and the touch sensor wiring 22 is thicker than a thickness of a portion formed between the pixel electrode 31 and the counter electrode 21.