Fuel supply portion structure of fuel supply pipe

A fuel supply portion structure of a fuel supply pipe, comprising:

• a tubular portion having an opening into which a nozzle of a refueling gun is inserted and a connection port to which the fuel supply pipe for supplying fuel to a fuel tank is connected;
• a flap mechanism which is provided on an opening side of the tubular portion and is pressed by the nozzle to open the opening when the nozzle is inserted through the opening;
• a drain hole formed in the tubular portion and communicating inside and outside of the tubular portion;
• an inner diameter member attached to an inner wall of the tubular portion;
• and
• a drain hole on-off valve for opening and closing the drain hole, wherein
• the drain hole on-off valve is disposed on a placement surface located at a lowermost side of the fuel supply portion structure on an inner wall of the inner diameter member,
• the placement surface is made of an inclined surface falling from the opening side toward the connection port with respect to a horizontal plane of the vehicle, and
• a wall portion rising toward the opening is provided on the opening side of the inclined surface.