A coordinate inputting device includes an X+ electrode having a plurality of X+ branch patterns extending from one side to the other side in the X direction, an X− electrode having a plurality of X− branch patterns extending from one side to the other side in the X direction, a Y+ electrode having a plurality of Y+ branch patterns extending from one side to another side in the Y direction, and a Y− electrode having a plurality of Y− branch patterns extending from one side to the other side in the Y direction. An X, Y coordinate position of an object is detected from, respectively, the difference between the floating capacitances of the X+ electrode and X− electrode, and the difference between the floating capacitances of Y+ electrode and Y− electrode, which change according to the surface area of the electrodes in proximity to the object to be detected.