PURPOSE: To provide a ship to which magnetic force is applied, in which high speed and practical structure is disclosed.

CONSTITUTION: Two lines of main waterways 2, 3 and one line of an auxiliary waterway 5 are disposed in the interior of a hull. A MHD power generating part 16, a steam power generating part 17 and a waterway power generating part 18 are provided in series in each of the main waterways 2, 3. At the time of cruising, power is generated in the MHD power generating parts 16, the steam power generating parts 17 and the waterway power generating parts 18 of the main waterways 2, 3, and water which has been already used for power generation is discharged from the ends of the main waterways 2, 3. At the time of mooring, water is circulated through the auxiliary waterway 5 to generate power.