A sensor device includes electrodes disposed in a detection region having plural segments such that the electrodes do not overlap each other. The plural segments are arranged in a matrix shape with plural, three or more rows and plural, three or more columns. Each of the electrodes is located on certain segments out of the plural segments. The certain segments are located certain rows out of the plural rows and certain columns out of the plural columns. When each of the segments in the detection region is operated, the electrodes output signals different from each other correspondingly to each of the plural segments. The sensor device can easily detect the operated position with a simple configuration.