PURPOSE: An air cavity vessel is provided to increase efficiency of design and production of the air cavity vessel by forming a cavity at the bottom of the vessel without changing the structure of a hull. CONSTITUTION: An air cavity vessel comprises an outer wall structure(110) and air bearings(120). The outer wall structure has a structure in which every side is closed and a bottom surface is opened and is installed at the bottom of a vessel to form a space for forming an air layer. The air bearings are installed inside the space formed by the outer wall structure to spray air for forming the air layer. The air bearings are composed by a porous block to spray air in a diffused state.
