Abstract: A steering wheel position detecting device of a vehicle steering system including a first ring-shaped track defining a space centered on a center of the steering wheel and a first ball provided within the first track for detecting a right turn of the steering wheel. The first track includes a first cutoff wall formed at a twelve o'clock position, a second cutoff wall formed at a six o'clock position to be partially opened towards the center of the steering wheel, and a third cutoff wall formed at an eleven o'clock position to be partially opened towards the center of the steering wheel. The first ball is positioned on a left side of the second cutoff wall and the first ball is movable through the opening formed on the second cutoff wall and the opening formed on the third cutoff wall. A second embodiment of the steering wheel position detecting device is designed for detecting a left turn of the steering wheel.