A touch panel input device includes a plurality of first electrode lines, a plurality of second electrode lines, a first drive circuit, a second drive circuit, a drive controller, a reception circuit, and a touch detector. The first drive circuit inputs a first drive signal to odd-numbered first electrode lines which are odd-numbered electrode lines among each of the plurality of first electrode lines from a first end portion side. The second drive circuit inputs a second drive signal to even-numbered first electrode lines which are even-numbered electrode lines among each of the plurality of first electrode lines from a second end side. The touch detector detects a touch on the touch surface based on a change in an output signal detected by the reception circuit.