To provide an automatic neutral point return type shuttle switch mechanism having a switch structure and operating principle allowing a switch-on to effectively make an operator recognized visually and by a variation in rotating resistance of a shuttle switch, manufactured at a low cost, and providing a high durability.

This shuttle switch mechanism comprises a rotating body 20 having, on the peripheral surface thereof, a projected plate with a flat rear surface and a flat projected part formed at the center part on the rear surface and a lateral rotation stopper 33 coming into contact with one end part of the projected plate in rotating direction and determining the maximum rotating position of the rotating body. The upper end of a bar body 50 is pushed down while being arrested by the projected part of the projected plate, and the lower end of the bar body 50 is also pushed down to turn on the switch. In addition, when the rotating body 20 is returned by rotation, the upper end of the bar body is pushed down while being arrested by the rear surface of the projected plate, and the lower end of the bar body is also pushed up to turn off the switch.