PURPOSE: To achieve a sufficient impact absorbing function, and achieve a high speed run for a vehicle having crawlers on track frames on both sides of a vehicle main body frame by installing the front and rear part of the track frame to a main body frame through dampers equipped with springs.

CONSTITUTION: A track frame 22 provided on each side of a vehicle main body frame 21 has an idler 24, track rollers 25a, 25b, and a drive sprocket 26, and a crawler 27 integrally molded of rubber is mounted along the idler 2, track rollers 25a, 25b and drive sprocket 26. The front part and rear part of the track frame 22 are installed to the vehicle main body frame 21 through dampers 23 having springs. The spring-equipped dampers 23 are provided in a similar structure to that of a Macpherson strut type suspension or a double wishbone type suspension. The vibration-resistance property for a road surface in a high speed run can this be improved, and high speed running can be enabled.