PURPOSE: To attain the use in a swamp and marsh land by mounting an aircraft engine and a flying wing to a general leisure boat of rubber boat or the like and constituting the boat as a high speed air boat.

CONSTITUTION: An aircraft engine (c) is mounted to a general leisure boat such as an FRP and/or rubber boat, and a propeller (b) can be rotated by power of the engine. While by removably mounting a triarc type wing (a) to this boat through a strut, flight can be performed by rotating the propeller (b).