FUEL SUPPLY UNIT STRUCTURE

To provide a fuel supply unit structure capable of restraining generation of rust by quickly discharging water that has entered a storage chamber to outside.SOLUTION: A fuel supply unit structure S includes: an outer panel 10 formed of a plate-like member, having a plate surface extending in a vehicle vertical direction while facing in a vehicle inner-outer direction and having a panel opening part 11 penetrating through the plate surface while forming an outer shape of a vehicle; an adapter 20 having a hollow box shape with an opening part and being arranged on an inner surface of the outer panel 10 with the opening part facing the panel opening part 11; a pair of joining pieces 13 joined to an inner surface of a bottom wall 22 which defines a bottom surface of the adaptor 20 and extending from a lower edge part of the panel opening part 11 to the inner side in the vehicle inner-outer direction; and a discharge groove 27 descending from the inner side to the outer side while extending along the vehicle inner-outer direction to the inner surface of the bottom wall 22 positioned between the pair of joining pieces 13.SELECTED DRAWING: Figure 4 【課題】収容室内に侵入した水を外部へ速やかに排出し、錆の発生を抑制することができる燃料供給部構造を提供する。【解決手段】板状部材からなり、車両内外方向に面しつつ、車両上下方向に延在する板面を有し、車両の外形形状を形成しつつ、板面を貫通するパネル開口部１１を有するアウタパネル１０と、開口部分を有する中空箱形状を有し、開口部分がパネル開口部１１に臨みつつ、アウタパネル１０の内面に配置されたアダプタ２０と、パネル開口部１１の下縁部分から車両内外方向内側へ延設されつつ、アダプタ２０の底面を構成する底壁２２内面に接合された一対の接合片１３と、一対の接合片１３の間に位置する底壁２２内面に、車両内外方向に沿って延在しつつ、内側から外側へ下る排出溝２７と、を燃料供給部構造Ｓに設ける。【選択図】図４