| 摘要 |
PROBLEM TO BE SOLVED: To suppress the positional deviation of a seal member while suppressing an increase in manufacturing cost of a fuel supply device.SOLUTION: A fuel supply device comprises: a connection part; a neck part 20 that includes a neck end part 21 having an opening end surface of the neck part 20 and extending from the opening end surface to the connection part, and an expanded diameter part 22 disposed to contact with the neck end part 21 on a side closer to the connection part side than the neck end part 21 and increasing its radial thickness toward the connection part side along a fuel supply direction; a retainer 30 that is fitted to the neck part 20 so as to continuously surround at least a part of an outer peripheral surface of the neck part 20, the opening end surface of the neck part 20, and at least a part of an inner peripheral surface of the neck part 20; a support member 60 that is disposed to face an inner wall of the retainer 30 and contact with the expanded diameter part 22; and a seal member 50 that is disposed in a region enclosed by the support member 60, the neck end part 21, and the inner wall of the retainer 30 on a side closer to the opening end surface side than the support member 60 to contact with the support member 60. |
