To realize not only an input operation by a normal keyboard or an input operation (tablet function) with the tips of fingers but also a handwriting input operation (digitizer function) with a pen which is difficult in a conventional manner.

A touch panel part 40 formed by adhering transparent resistive film sheets on the both surfaces of the front and rear sides of a transparent glass is mounted between a keyboard 24 and a flat panel display 32 provided at a portable electronic equipment such as a note book PC 10 so as to be rotatable. This touch panel part 40 is rotated to the flat panel display 32 side or the keyboard 24 side as necessary so that an input method can be switched. Thus, the three kinds of input operations, that is, an input operation by the normal keyboard 24, input operation (tablet function) with the tips of fingers, and input operation (digitizer function) with a pen can be supported by newly introducing the freely rotatable touch panel part 40 to the portable electronic equipment 10.