To provide a fuel supply device which can reduce air suctioning noises even in the case that residual fuel amount inside a fuel tank is decreased.
A fuel supply device 10 is housed in a fuel tank. A bottom part of a sub-tank 30 of the fuel supply device 10 is always pressurized against a bottom wall inside the fuel tank. A jet pump 40 has a jet nozzle 41 for injecting return fuel, and a shielding member 42. When the return fuel is injected from the jet nozzle 41, the fuel inside the fuel tank is suctioned due to suctioning pressure lower than atmospheric pressure caused by the injected fuel. The fuel is forcibly fed into the sub-tank 30 through a fuel suctioning port 32 formed on a lower portion of the sub-tank 30. It is possible to suppress suctioning of the fuel on the side of the level surface and generation of vortex flow, even when the fuel inside the fuel tank is decreased and a fuel level is lowered, since the fuel level side of a clearance 50 formed between the jet nozzle 41 and the fuel suctioning port 32 is covered with the shielding member 42.
YASUDA MINORU
MUKOUYA AKIYOSHI
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