Abstract
Since home robots intended for housekeeping and elderly care have inevitable contact to a humana, they have to be flexible and lightweight for their intrinsic safety. However conventional robots which use electric motors are hard and heavy, so they are not suitable for safe coexistence with a human. From this background, we have developed a lightweight pliant robot arm which has an intrinsically safe, flexible and lightweight structure by pneumatic muscles, and has sufficient positioning and force controling accuracy for daily domestic tasks.