Abstract: In an amphibious vehicle having driven wheels for movement along dry surfaces and a driving unit for movement through fluids, the improvement comprising at least one of the driven wheels being provided with supports and a positioning mechanism for propeller blades, which, upon rotation of the wheel, generate motion through the fluid according to the principle of cycloidal propellers. The supports for the propeller blades are arranged and constructed such that the propeller blades protrude laterally out of the wheel rim, whereby the axis of rotation of the propeller blades are inclined a small, acute angle towards the axis of the wheels.