To prevent boards from suddenly deforming, and also, improve the operability by increasing the recovering performance by a method wherein in a region for a boot binder of a ski board (snow board), a plurality of cylindrical bodies and a plate-form platform which are fitted on the upper surface of the ski board, are connected with a rigid elastic material, and a flexible elastic material.

When this device is applied to a ski board 6, to the toe parts and the heel parts of boots, platforms 1, 1 of this recovery force assisting device are attached 3 with anchor bolts. Each platform 1 has a honeycomb structure, and a cutting line 4 for a length adjustment is formed on the center side, and at the same time, a recovery force assisting block 2 is connected. Each block 2 is preferably attached to a boot center 5 in a binder attaching region of the ski board 6. Thus, by providing the recovery force assisting device, a twisting of the ski board 6 is suppressed, and the recovery force is properly assisted, and the durability and the straight advancing property of the board under a usage are improved, and at the same time, a stable control can be performed at a turning motion or the like.