A valve control apparatus for an internal combustion engine is provided which
is
capable of optimally setting the closing timing of an engine valve according to
operating conditions of the engine while suppressing an increase in the inertial
mass of the engine valve to the minimum, thereby attaining improvement of fuel
economy, and realization of higher engine rotational speed and higher power output
in a compatible fashion, and reducing costs and weight thereof. The valve control
apparatus controls opening and closing operations of an engine valve. A cam-type
valve actuating mechanism actuates the engine valve to open and close the engine
valve, by a cam which is driven in synchronism with rotation of the engine. An
actuator makes blocking engagement with the engine valve having been opened, to
thereby hold the engine valve in an open state. An ECU controls operation of the
actuator to thereby control closing timing of the engine valve.