Variable valve device for internal combustion engine

A variable valve device for an internal combustion engine includes a first cam phase variable mechanism capable of varying the phases of both first and second intake cams by using operating oil pressure, and a second cam phase variable mechanism having a split change function and capable of varying the phase of the second intake cam relative to that of the first intake cam by using the operating oil pressure. When the engine is operating in a low-speed, low-load region (A) in which the engine rotating speed is lower than a predetermined rotating speed (N 2 ) and at the same time the engine load is lower than a predetermined load (L 1 ), the second cam phase variable mechanism is preferentially controlled over the first cam phase variable mechanism. (Representative Figure: FIG. 2 )