A touch panel device includes a plurality of transmission electrodes and a plurality of reception electrodes disposed in a sensing region on a substrate, the transmission electrodes and the reception electrodes forming a sensor cell, wherein the sensing region has a non-rectangle shape, a plurality of the sensor cells is arranged in the sensing region in a row direction and in a column direction, and each sensor cell has a region shape according to a shape of the sensing region such that number of the sensor cells in respective rows is the same and number of the sensor cells in respective columns is the same.