VALVE OPENING AND CLOSING TIMING CONTROL APPARATUS

A valve opening and closing timing control apparatus (A) includes: a driving side rotor (20) synchronously rotating with a crankshaft (1) of an engine (E); a driven side rotor (30) disposed at a coaxial core with a rotary shaft core (X) of the driving side rotor and integrally rotating with a camshaft (5) for a valve opening and closing; a connecting bolt (50) disposed at the coaxial core with the rotary shaft core to connect the driven side rotor to the camshaft, and on which an advance angle port (50A) and a retard angle port (50B) are formed on an outer peripheral surface; and a spool (41) disposed in a spool chamber (51 S) of the inside of the connecting bolt, and controlling the feeding and discharging of working fluid to the advance angle port or the retard angle port from a pump port (50P) formed on the connecting bolt.