PURPOSE: To attain even the input of a keyboard by using an input keyboard set on a coordinate reading plane and a switch means which performs the switch between the input of the keyboard and the handwritten input of the coordinate reading plane.

CONSTITUTION: A limit switch is attached to a handwritten input device frame 4 and a knob 9 of the limit switch is pushed down when a keyboard matching plate 2 is put on the knob 9. Thus the contact of the limit switch is changed to switch the handwritten input to the keyboard input. the pushing pressure supplied through a keyboard head part 1' receives the proper reaction and a shift amount via a spring 5 and a buffer member 6 and is transmitted to a protecting film 3' formed on a coordinate reading plane and a pressure- sensitive sheet 7 of a handwritten device. Then the coordinate read in the form of the change of pressure are moved and converted into the electricity. The part 1' is held by the spring 5 and the member 6 and gives the sense to fingers with a fixed shift amount and the fixed reaction. In such a constitution, a keyboard input device is obtained.