To provide a floating multi-unit dwelling house.

A floating dwelling place 10 is fixed to a water permanently existing place such as the ocean. This dwelling place 10 has a pyramidal upper part supported by a lower pyramidal part. A column 16 supports an upper part on a wave line by striding over between the lower part and the upper part. The lower part is fixed to the bottom of the sea. A ballast chamber and additional ballast weight are made for controlling stability. A dock is made along an upper side surface for anchoring a ship.