A touch panel device includes: a plurality of detection regions arranged in a matrix form; and a transmission wiring element and a receiving wiring element formed for each detection region, wherein a transmission wiring arrangement region with the transmission wiring element, the plurality of detection regions, and a receiving wiring arrangement region with the receiving wiring element are formed being aligned in one direction, wherein a value calculated from a formula as follows is smaller than a target value for a coordinate position precision: AW+2*BW−TC, wherein BW is an interval width from one of the detection regions to a next of the detection regions via the receiving wiring arrangement region and the transmission wiring arrangement region in the one direction, AW is a width for the detection regions in the one direction, and TC is a touch diameter.