To provide a ship capable of comfortably sailing on the water by manpower and capable of being easily sprung upward when foreign matter sticks to an underwater propeller or the underwater propeller touches the water bottom in a shoal.

The ship in the shape of being propelled by rotating the underwater propeller 10 by a foot stepping system using manpower, is provided with a motor-driven assistant device 3 in the driving device, and is additionally provided with an underwater propeller springing-up device featured by springing up the underwater propeller 10 in the air with a motive power relay driving wheel shaft 5 of a vehicle as a fulcrum.