Fuel tank dam

A fuel tank dam that closes a gap between a first structural component fixed to an inner surface of an outer plate of a fuel tank and a second structural component having a cutout portion into which the first structural component is inserted, the fuel tank dam comprising:

• a first section capable of being fixed to the first structural component and extending in a longitudinal direction of the first structural component;
• a second section capable of being fixed to the second structural component;
• a third section which has a bellows having at least one folded portion and is disposed between the first section and the second section;
• and
• a flange section extending along the outer plate and to be fixed to the inner surface of the outer plate,
• wherein the flange section includes at least:
• a first flange section that extends from a first edge portion of the first section located on a side close to the outer plate;
• a second flange section that extends from a second edge portion of the second section located on the side close to the outer plate;
• and
• a third flange section
• that extends without interruption in the longitudinal direction along the outer plate from at least a third edge portion of the third section located on a side close to the outer plate,
• that is configured to be fixed to the inner surface of the outer plate,
• that is continuous with the first flange section and the second flange section, and
• that has at least one recessed portion which communicates with a recessed groove formed inside said at least one folded portion, respectively.