PURPOSE: To use the mouse without limiting the use of a keyboard by containing a mouse pad in the lower pat of the keyboard so that it can be drawn out, drawing out the mouse pad from the keyboard and utilizing it at the time of using the mouse, and also, turning the mouse pad to the side position as necessary.
CONSTITUTION: A mouse pad 31 contained in the lower part of a keyboard 3 is drawn out, and in this state, a mouse 6 is used on the mouse pad 31. On the other hand, the keyboard 3 can be used freely. Also, as for the drawn-out mouse pad 31, by turning it by 180° to the side of the keyboard 3 as shown with a chain line, the mouse 6 can be used in this position. In such a way, the mouse can be used efficiently on the mouse pad without obstructing the use of the keyboard.