The invention provides a valve timing control apparatus for an internal combustion engine. The apparatus enables a torsion spring to be installed even after assembly of a housing (front plate). One end portion (30a) of a torsion spring (30) passes through an inner peripheric hole (43a) of a cylindrical sleeve portion (43) of a front plate (26) to be fixedly clamped at a first groove-shaped clamping portion (19) that is open toward the axial front transverse plane of a rotor main body (15) facing outwardly, and the other end portion (30b) of a torsion spring is fixedly clamped at a second groove-shaped clamping portion (45) disposed on the axial front transverse plane, i.e., the outer side opening, of a rotor main body (15).