This is folding typed door without door case suitable for indoor automation in narrow pedestrian place. Semi-Airtight type by special rubber gasket seal. The door is most suitable for room partition or entrance where enough space cannot be secured. As no need of guide rail on the floor, stretcher and carriage can be passed smoothly. The door can be recommended confidently to hospital surgery room and hotel kitchen room. By equipped with our drive-unit with special cam-link system and microcomputer programmed together with the door movement, the door can be operated smoothly and speedily without any stiff movement as frequently performed by the usual door.