In a valve timing controlling apparatus having: a first rotary body rotatable with a cam shaft of an internal combustion engine; a second rotary body rotatable with a crank shaft and rotatable relative to the first rotary body; a controlling means for varying relative rotational phase between the first rotary body and the second rotary body; and a torsion coil spring for urging the first rotary body relative to the second rotary body in a phase advancing direction. The coil portion 22 of the torsional coil spring 20 includes a pair of holding areas 23a, 23b extending continuously from the respective retaining portions and capable of fixing the coil portion in position relative to the first rotary body 1 and the second rotary body 2 and includes also a torque generating area 25 disposed between the pair of holding area. The holding areas and the torque generating area have different coiling diameters.