PROBLEM TO BE SOLVED: To provide a structurally simple and inexpensive levitation type small room, for enabling even an elder and a child to easily evacuate in a short time, when a large Tsunami is caused.SOLUTION: The levitation type small room is provided so that a buoyancy chamber of fitting a foaming polystyrene foam inside by enclosing the periphery by a steel plate, is placed on an upper part of a foundation structure constructed on a foundation, and a one-story house is constructed in an upper part of its buoyancy chamber integrally with the buoyancy chamber, and when a large Tsunami comes close to one's side, the one-story house constructed integrally with the buoyancy chamber is floated in a state of keeping a substantially horizontal state, and an outboard engine is installed in the lateral direction on the indoor side of an outward opening door for the outboard engine of the one-story house, and after the one-story house constructed integrally with the buoyancy chamber floats on the large Tsunami,
