PURPOSE: To increase the friction force of each sled of a small hovercraft and provide possibility of stopping quickly when the hovercraft is running on ice or frozen snow by equipping the sled at its tail with a removable slip preventive tool.

CONSTITUTION: A sled 2 is fixed to the bottom surface of a hovercraft body 1, and at its tail a removable slip-preventive tool 3 is fitted. That is, a slip- preventive tool mounting jole 7 provided at the tail of the sled 2 of slip- preventive tool 3 having a slip-preventive part in the form of saw-teeth is secured to a mounting hole 8 by a mounting screw 9.