A variable valve operating apparatus including a drive cam, a rocker cam
pivotally supported on a first pivot, a lift varying mechanism operative
to change a pivotal position of the rocker cam to vary a valve lift of an
engine valve, a swing arm including one end portion at which the swing
arm is pivotally supported on a second pivot and the other end portion
contacted with the engine valve, a hollow space defined between the end
portions of the swing arm, and a driven roller rotatably disposed within
the hollow space of the swing arm and contacted with a cam surface of the
rocker cam. When the valve lift of the engine valve is a predetermined
lift amount or more, a contact point between the driven roller and the
rocker cam is located in the hollow space of the swing arm.