PURPOSE: To quickly make progress in well-balanced skiing by attaching a receiving base, and a set metallic fixture to the left and the right front parts of ski plates, and the rear parts, respectively with an adhesive seal or a screw, and attaching a V-type lot arm and a strap.

CONSTITUTION: In order to hold long a truncated chevron of a fundamental type bend, a receiving base 1 is stuck to the left and the right front parts of ski plates with double adhesive seals 1-1-1-4, or attached with a screw, and V-type lot arms 2, 3 are inserted into the receiving base from the upper part. Joints of the lot arms 2, 3 are connected as a supporting point of the left and the right ski plates, so that each of the left and the right ski plates is not superposed in the front. Also, to the left and the right rear parts of the ski plates, a set metallic fixture 6 is stuck with adhesive seals 6-1, 6-2, or attached with a screw. To the set metallic fixture 6, a strap 7 which can adjust the expanse prevention of the left and the right ski plates is attached. This metallic fixture adjusts an expanse of the left and the right ski plates by the strap so that a truncated chevron of a bend holds suitable width in accordance with user's height.