To provide a swing mechanism of a steering wheel for improving riding comfort by swingably connecting a steering axle to a steering rotation shaft for turning the rigid type steering axle in a three-wheel type industrial vehicle.

A center pin 12 is installed, by directing it in a longitudinal direction, at the lower end of the steering rotation shaft 6 in the three-wheel type industrial vehicle which is equipped with a driving wheel 1 and the steered wheels 4 before and behind a vehicle body frame 5, and wherein the rotation shaft 6 rotating in conjunction with the steering wheel 3 is attached to the steering axle 7 supporting the steered wheels 4 to turn the steering axle 7 in the steering direction; and a holder member 14 formed integrally with the steering axle 7 is swingably connected to the center pin 12.