PURPOSE: To easily and surely perform rise-up even at the time of a weak wind or no wind by feeding gas to an air intake bag and a canopy from a gas pipe by a blower means, and forming a wing section by the canopy while closing an air intake.

CONSTITUTION: A suspension line 3 is mounted to a canopy 1 having an air intake 15 in which both upper/lower wing surface parts 11, 12 are connected by a beam-like cloth 13. A pilot suspending part 4 is arranged in a lower end of the suspension line 3. In the above constitution, an air intake closing bag 2 is stored in a front edge part of the canopy 1. A blower means 5 with a blow air control part 5a is arranged in the pilot suspending part 4. Further, both end parts of a gas pipe 6 are connected respectively to the blower means 5, air intake bag 2 and the canopy 1. Gas is fed to the gas pipe 6 from the blower means 5 to form a wing section by respectively inflating the air intake bag 2 and the canopy 1.