Abstract: A rotating spherical head and valve internal combustion engine includes an engine block having at least one combustion cylinder which is sealed by a rotating spherical head and valve. The rotating spherical head and valve includes an intake path opening and exhaust opening for directing intake air into the combustion chamber and for exhausting combustion gasses from the combustion chamber as the spherical head and valve rotates. In one embodiment of the invention, a spark plug and/or fuel injector are mounted in the cylinder combustion chamber for injecting and igniting fuel in each combustion chamber. The ignition can be by the sparkplug or can be by compression of the piston when fuel is injected in the combustion chamber. In a preferred embodiment, the rotating spherical head and valve mechanism allows for improved air intake and exhaust gasses outlet by 100% or more as compared to today's poppet valves.