To lift a hull quickly in a navigation starting time and to perform stable high-speed navigation.

In a high-speed ship 1, a horizontal blade 2 provided with an elevator (flap) 2a, a vertical tail blade 3 provided with a rudder 3a, and an aerial propulsion power (aerial propeller) 5 for a high speed navigation time are arranged in the upperwater position of a hull 1a. An auxiliary member (balancer) 6 for stabilization in the horizontal direction in a navigation time is arranged in the ship bottom central position of the hull 1a, while a hydrofoil 7, which is freely retractable in the both board side directions from the inside, is arranged in the balancer 6.