Abstract: A dual follower variable valve timing mechanism for varying the timing of the intake and exhaust valves of an internal combustion engine. Adjacent sets of angularly offset cams are provided on a rotatable camshaft for actuating each valve of the engine, one cam of the set providing a short duration timing and the other cam of the set providing a long duration timing. A first follower for each set of cams has leading and trailing portions having control surfaces which conjointly engage the respective cams. A second, crescent-shaped follower is pivotally mounted in one end of the rocker arm that actuates the valve and has control surfaces which engage the first follower. Links connect the first follower with a crank which is rotatable in opposite directions by a control mechanism responsive to different operating parameters of the engine.In another embodiment, the first follower includes spaced pair of leading rollers and a central, trailing roller which engage the cams.