A valve timing control apparatus includes: a drive-side rotor rotating in synchronization with a crankshaft of an internal combustion engine; a driven-side rotor arranged to have the same shaft center as the drive-side rotor, rotating in synchronization with a camshaft for opening and closing valves; a fluid pressure chamber formed between the drive-side driven-side rotors; a partitioning portion provided in at least one of the drive-side and driven-side rotors; a timing advance chamber and a timing delay chamber formed by partitioning the fluid pressure chamber by the partitioning portion; a lock mechanism including a lock member and a concave portion a lock release flow path through which operating fluid supplied and discharged to and from the concave portion is circulated; a valve arranged in the middle of the lock release flow path; and a control unit controlling the operation of the valve.