Fuel supply device

A fuel supply device adapted to supply a fuel to a fuel tank, comprising:

• a filler neck provided to include a fuel supply port, which is adapted to receive a fueling gun, and configured to form part of a fuel passage from the fuel supply port, wherein the fuel passage is adapted to supply fuel to the fuel tank, and wherein the filler neck comprises a filler neck main body, which includes an internal passage that forms part of the fuel passage, and a fuel vapor port, which is branched off from the filler neck main body to communicate with the internal passage of the filler neck main body;
• a fuel vapor pipe connected with the fuel vapor port and adapted to supply a fuel vapor in the fuel tank to the internal passage of the filler neck main body;
• and
• a buffer member at least partly placed between the filler neck main body and the fuel vapor port in a neighborhood of a branch portion where the fuel vapor port is branched off from the filler neck main body, wherein
• the buffer member includes a main body portion and a cover portion that is engaged with the main body portion,
• in a state in which the main body portion and the cover portion are engaged with each other, a through hole is formed between the main body portion and the cover portion, and
• the fuel vapor port is inserted in the through hole.