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 internal combustion engine (E); a driven side rotor (30) disposed coaxially with a rotary axis (X) of the driving side rotor and synchronously rotating with a camshaft (5); a connecting bolt (50) disposed coaxially with the rotary axis, and connecting the driven side rotor to the camshaft; and a position determination unit (FB, RB) performing positioning between the driven side rotor and the camshaft, or in a case where an intermediate member (9) is provided between the driven side rotor and the camshaft, between the driven side rotor and the intermediate member, or between the camshaft and the intermediate member, wherein the position determination unit includes an engaging pin (71, 72), first and second hole portions (FH1, RH1, FH2, RH2), and a deformation absorbing unit (R).