To provide a small sized rear-wheel-drive crawler type tractor at low cost.

The small-sized crawler type tractor is equipped with a crawler type traveling device which has a crawler frame rotatably supporting a driven idler on both ends, and a drive sprocket mounted to a rear axle case, and wherein a crawler is wound between the driven idler and the drive sprocket at the lower part of the upper part vehicle body. In this case, the crawler frame is fixedly provided on the upper part vehicle body by at least two support members, and the fixedly provided place is further at the rear part of the vehicle than the tip end part of the crawler type traveling device. The crawler type traveling device can be fixedly provided on the upper part vehicle body by only support member, total weight can be reduced, and the turning property can be improved.