PROBLEM TO BE SOLVED: To provide a ship using methanol as fuel, capable of overcoming problems of installation measures for cryogenic temperature and utilization efficiency that are problems faced in a case of using liquefied natural gas fuel as fuel, and cutting emission of sulfur oxides and carbon dioxide contained in exhaust gas at low cost.SOLUTION: A ship is configured so that an internal combustion engine 11 operable with methanol used as fuel is disposed within an engine room 2, a methanol fuel tank 12, a methanol supply system 13, and a valve unit 14 are disposed on an upper deck 6, a methanol drain tank 16 is provided outside of the engine room 2, and piping parts 23a and 24a disposed within the engine room 2 are formed into double pipes in a second pipe arrangement 22 supplying the methanol from the methanol supply system 13 to the valve unit 14, a third pipe arrangement 23 supplying the methanol from the valve unit 14 to the internal combustion engine 11, and a fourth pipe arrangement 24 dischargin
