The living space with a movable floor has not only the fixed floor but the movable floor which stops at the upper position or at the lower position. One room is used for two kinds of uses. The purpose of the development of this system is to realize a movable living space which is corresponding to present-day needs, comfortable, efficient, and safe. The characteristic of this system is the free choice of the room use which the resident wants at all times. The another characteristic is the economic effect because this space can be used twice.
