PURPOSE: To get along with a small occupied area for installation of a mouse plotter device by providing a mouse part in a main body case for input of coordinates and a plot part also formed in the main body case for plotting the coordinates.

CONSTITUTION: The mouse plotter devices 21 and 22 are connected to an infor mation transmission cable 23 via an external interface part 14. The cable 23 is connected to an external device 22. A plot state display part 9, a plot pen up-down switch part 10, and a point input switch part 12 are provided at the upper front side of a main body case 18 of each mouse plotter device. Mean while, a coordinate shift ball 16 and an auxiliary ball 19 protrude over the lower side of the case 18. Furthermore, a plot pen part 17 is obliquely extended to the front lower side of the case 18. In such a constitution, it is not required to prepare a mouse device and a plotter device independently of each other. Then, only the area for installation can be reduced.