It is considered that a space manipulator will have a very light and flexible structure. Recently, the research of such flexible manipulators has been widely studied. However, most flexible arms have only one or two joints and are constrained to a plane. Therefore, it is still far from industrial and space applications. From the viewpoint of practicability, the authors propose a new method which makes a flexible manipulator move stably in three dimensional space. Several experiments of a three dimensional flexible manipulator were performed and satisfactory results were obtained.