Patent ID: 6932039

Claim:
A valve timing adjusting apparatus, comprising: a first rotating body which is provided on a first driving force transmitting member for transmitting driving force from the driving shaft of an internal combustion engine to driven shafts for opening and closing either intake valves or exhaust valves, and adjusts the opening/closing timing of the either; and a second rotating body which is provided on a second driving force transmitting member for transmitting the turning force of the first rotating body to the other driven shaft, and adjusts the opening/closing timing of the other, wherein the first driving force transmitting member and the second driving force transmitting member respectively have a first endless member for power transmission and a second endless member for power transmission, the peripheral shape of the second rotating body has a circumferential shape portion and cutoff shape portions of which distance from the center of rotation is shorter than a distance from the center of rotation to the circumferential shape portion, and the first rotating bodies and the second rotating bodies are assembled to the internal combustion engine in such a manner that the cutoff shape portions are positioned in such a rotation angle position that the first endless member for power transmission can be inserted in between the first rotating bodies and the second rotating bodies.