To enable the fine adjustment motion of a mouse to be moved by inclining it in all the directions of 360° at the time point of completely moving the mouse, while by making the inner surface of the spherical mouse which can longitudinally and laterally move on the surface of a mouse pad into an electrode for transmission.

The inner surface of the spherical mouse, which can longitudinally and laterally move on the surface of the mouse pad, is made into an electrode for transmission. Namely, the mouse part of a pen type cordless mouse input device is pen-shaped, the reading part has a spherical form, this entire spherical form is an electrode for reading, and this electrode for reading and a control substrate 13 located at a central part in the spherical form are connected so that a signal for coordinates reading and a state as a switch provided with the pen-shaped mouse can be sent to the electrode. Besides, switches 9-11 utilizing photosensors are arranged at the top end part and both side parts of the control substrate 13 located at the central part one by one and by closing respective holes, the switch corresponding to the arranged sensor is turned on.