Abstract
This paper proposes a novel lightweight robot arm for astronautical development by using honeycomb structure. A robot arm is an arm of the machine which works holding, releasing, carrying, etc. It is used not only on the ground, but is used in space. In the space aeronautics field, all the launched objects should possess lightweight and compact to save launch cost. For this purpose various lightweight materials have been developed. Honeycomb structure is one of such lightweight material and already used in astronoutical field mainly for large panels. In this study, we propose to appliy honeycomb structure to realize lightweight and compact arm.