Abstract: A capsule room unit for use as a capsule bed or other private space has a horizontally oblong rectangular parallelepiped room framework formed by columns, beams and panel materials fitted into the room framework to constitute a ceiling, a floor and walls, wherein the columns and the beams are composed of extruded materials each having a longitudinally consecutive groove. The panel materials of the ceiling and walls are composed of synthetic resin or FRP hollow panel materials each having peripheral flanges at a periphery along a plane direction, and the flanges of the hollow panel material are inserted and fitted to the grooves of the extruded materials.