In a switch operating mechanism in which the elastic force of a spring energized is transmitted through a link mechanism to achieve a switch opening or closing operation, one end of a first torsion bar is fixedly secured to a rotatable member while the other end is fixedly secured to a stationary part of the mechanism, and one end of a second torsion bard is fixedly secured to the rotatable member in such a maner that the one end is diametrically opposite to the one end of the first torsion bar while the other end is rotatably supported by the stationary part and coupled to the link mechanism.