Disclosed is an inexpensive money safe which is safe against fire and the like and which can easily be utilized when necessary. A basement (10) for accommodating a movable money safe (1) is accommodated in the basement (10), and upper surface of the movable money safe (1) is covered with a fireproof lid (15) which is the same color as that of the floor (12), and if the movable money safe (1) is driven into the room interior (11) for utilizing the movable cylinder unit (20) which is operated with water pressure of running water to drive the movable money safe (1) into the room interior (11).