A variable valve lift apparatus may include a camshaft, a cam piece having first cams having lift amounts that are different formed at one side thereof, a first cam protrusion portion formed near the first cams that is slidably disposed on the camshaft to rotate with the camshaft, a first guide pin that protrudes on one side of an exterior circumference of the first cam protrusion portion, a first guide that is disposed to correspond to the first cam protrusion portion and in which a first guide groove is formed thereon to move the first cam piece in one direction along the camshaft according to the rotation of the first guide pin, and a first operation portion that moves the first guide toward the first cam protrusion portion such that the first guide pin is inserted into the first guide groove of the first guide.