PURPOSE: To freely change a progressive direction by a simple operation by driving a floating body by operating a propeller means interlocked to a propellent part in which a motor is set as a driving source.

CONSTITUTION: The floating body 1 is formed in such a way that an appearance is imitated to an airplane having horizontal wings 3, 3 and 4, 4 and a vertical wing 5, and helium gas is filled in the inside. A car gondola 6 is formed at the lover part of the floating body 1, and also, the propeller means 7, 7 are housed at both sides of the car gondola 6, and the driving part 8, a releasing means 9, and a variable means 10 are housed in a machine frame (a) arranged in the inside. The motor 17 is used as the driving source of the driving part 8. Therefore, it is possible to propel the floating body 1 forward or to change a direction by setting or releasing the interlocked state of the motor 17 with the driving part 8 and the propeller means 7, 7 by the releasing means 9, and also, to fly the floating body 1 with the variable means 26. In such a way, a flying range can be widened.