A variable valve timing control device, comprising: a driving side rotation member configured to synchronously rotate with a driving shaft of an internal combustion engine; a driven side rotation member provided inwardly of the driving side rotation member to be coaxial with the driving side rotation member, the driven side rotation member integrally rotating with a camshaft for opening and closing a valve of the internal combustion engine; a fluid pressure chamber (4, 41, 42) defined between the driving side rotation member and the driven side rotation member; a control valve controlling a supply and draining of an operation fluid to and from the fluid pressure chamber (4, 41, 42) to change a relative rotational phase of the driven side rotation member relative to the driving side rotation member between a most advanced angle phase and a most retarded angle phase; and an intermediate member being positioned inwardly of the driven side rotation member between the driven side rotation member and the camshaft, the intermediate member including the control valve inwardly thereof; characterized by a torsion spring being retained by the driving side rotation member and the intermediate member to bias the driving side rotation member and the driven side rotation member either in a first rotation direction or a second rotation direction which is different from the first rotation direction; wherein an end portion of the torsion spring is retained by a stopper portion opening at a contact surface of the intermediate member relative to the camshaft, the stopper portion extending radially inward from an outer circumferential surface of the intermediate member. a driving side rotation member configured to synchronously rotate with a driving shaft of an internal combustion engine; a driven side rotation member provided inwardly of the driving side rotation member to be coaxial with the driving side rotation member, the driven side rotation member integrally rotating with a camshaft for opening and closing a valve of the internal combustion engine; a fluid pressure chamber (4, 41, 42) defined between the driving side rotation member and the driven side rotation member; a control valve controlling a supply and draining of an operation fluid to and from the fluid pressure chamber (4, 41, 42) to change a relative rotational phase of the driven side rotation member relative to the driving side rotation member between a most advanced angle phase and a most retarded angle phase; and an intermediate member being positioned inwardly of the driven side rotation member between the driven side rotation member and the camshaft, the intermediate member including the control valve inwardly thereof; characterized by a torsion spring being retained by the driving side rotation member and the intermediate member to bias the driving side rotation member and the driven side rotation member either in a first rotation direction or a second rotation direction which is different from the first rotation direction; wherein an end portion of the torsion spring is retained by a stopper portion opening at a contact surface of the intermediate member relative to the camshaft, the stopper portion extending radially inward from an outer circumferential surface of the intermediate member.