FUEL SUPPLY SYSTEM FOR VEHICLE

The invention provides a fuel supply system mounted from an opening provided at a bottom of a fuel tank into a tank, and in which diameter of the opening of the tank can be reduced, and fuel pump, fuel filter and others can be firmly secured thereby achieving a fuel supply system resistant to vibration. A recessed cup portion 13b having a smaller diameter than an opening 2 is provided on a base seat 13, which closes the opening 2 at the bottom of a fuel tank 1. A plurality of support stays 14 is fixed to a wall 13c erected from the cup portion 13b. A fuel pump 5 is combined with a fuel filter 7 for filtering a fuel liquid fed from the fuel pump 5, and a suction port side of the fuel pump 5 is positioned at the bottom of the cup portion 13b and fixed to the plurality of support stays 14. The cup portion 13b is arranged to be eccentric from a position D conforming to an outer circumference of the opening of the fuel tank 1, and a feed terminal 11 is provided on a plane of the eccentric space formed between the cup portion 13b and the position D conforming to the outer circumference.