To provide a coordinate input device which performs a switch input operation by the moving operation of a cursor and a series of operations even with an additional function of a switch input added and also does not make a malfunction.

A substrate is arranged under a flexible sheet 2, which bends together with a lower tablet sheet 101b in parallel with it with slight gap between them, the contact width of the sheet 2 and the substrate 3 is detected and when their contact width becomes a prescribed width or more, switch data that represents the depression of a switch is outputted. Because the switch data can be outputted only by changing depression force to an upper tablet sheet 101a, it can be performed with the moving operation of a cursor and a series of operations. Also, because of the discrimination with the contact width, the malfunction of switch data generation can be prevented by using a dedicated pen that has large curvature of a depression plane in an operation switch does not have to generate switch data.