Variable valve timing controller

A variable valve timing controller arranged at a pathway transferring a driving force from a driving shaft to a driven shaft opening or closing at least one of an intake valve and an exhaust valve, the variable valve timing controller controlling an opening/closing timing of the intake or exhaust valve, comprising:

• a housing rotating with the driving shaft and having a room formed within a predetermined angle in the rotating direction of the driving shaft;
• a vane rotor having a vane, which divides the room into two chambers, and relatively rotated against the housing by a pressure of oil in the two chambers;
• and
• a fastening member having a pressure portion, diameter of which is smaller than diameter of the driven shaft, and fastening the vane rotor to the driven shaft by pressing the pressure portion toward the axial direction of the driven shaft,
• wherein a space is formed between an outer side wall of the vane rotor in the side of the pressure portion and an inner side wall of the housing facing the outer side wall, and
• before the vane rotor is fastened to the driven shaft by the fastening member, the space in the inside direction of diameter is formed smaller than the space in the outside direction of diameter.