Abstract
Robots have been used widely in the industrial area by the development of actuators and sensors. Recently, the robots are applied cooperative works with humans as like life support robots, and entertainment robots. In these areas, the essential safety for humans is needed. The purpose of this research is the development of a pneumatic manipulator for realizing of essential safety by using extremely lightweight of links and actuators. This manipulator is configured with a lightweight link, a bag shape actuator, and variable viscosity elements. All parts are made by lightweight materials. In this paper, the structure about these three composition elements of the extremely lightweight pneumatic manipulator is described.