To provide a fuel supply system for a boat capable of suppressing deterioration in engine startability.

The fuel supply system for the boat includes a vapor separator tank 45 arranged in a hull 100 and connected to a fuel tank 102 for storing fuel to store the fuel, an injector 47 for supplying fuel to an engine and a high pressure fuel pump 46 for supplying fuel stored in the vapor separator tank 45 to the injector 47. The high pressure fuel pump 46 includes a pump main portion 46a having a fuel path and a pump driving section separated from the fuel path of the pump main portion 46a.