To provide a device and method for allowing a signal detector such as a computer system to generate an electrostatic signal by means of a tablet and a touch pen which can be manually operated linking with this tablet.

This device is provided with an electrostatic input pen 13, and a top end 14 of the pen 13 linked with a table 20 is made conductive and flexible, and according as the top end 14 of the pen 13 held by a hand is pressurized on an uppermost insulating layer 12 of the table 20, a contact area with the table device 20 can be enlarged. Also, signal source 14 and a signal detector 50 are connected in series between the top end 14 of the pen 13 and a lower conductive layer 11 of the tablet 20. Therefore, the enlargement of the area in contact with the top end 14 of the pen 13 increases capacitance between the top end 14 and the lower conductive layer 11 of the tablet 20, so that the S/N of a detection signal can be improved.