PURPOSE: To fly and glide easily and in safety by arranging an automorphic element part which is respectively extended in both of a blade width direction and a chord direction or to the either direction thereof, and which expands by filling compressed air.

CONSTITUTION: A canopy 1 is constituted so that a bladder main body which has an air intake 10 along a front rim 6 thereof and which is sealed at a rear rim 7 thereof, is formed by upper and lower both surfaces sheats 2, 3, both blade end walls 5 connecting to the sheats 2, 3, and a plurality of a partition wall 4, while a stabilizer for prevention of sideslip is installed on the lower rim of both blade end walls 5. In this case, an automorphic element part 20 is provided on the canopy 1. And air tubes which are not shown in figure are arranged respectively in a blade width B direction in each of inner surfaces of an upper surface sheat 2 along the air intake 10 and the rear rim 7, and in a chord L direction along the inner surface of the upper surface sheat, and then it is communicated to each other so as to form an automorphic element part 20.