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A movement permitting section is provided at a nozzle guide 22 at an interior of an inlet pipe 14. When a stopper 24 receives pushing force toward a fuel tank side from a refueling nozzle 18, the movement permitting section deforms so as to permit movement of the stopper 24 toward a radial direction

A movement permitting section is provided at a nozzle guide 22 at an interior of an inlet pipe 14. When a stopper 24 receives pushing force toward a fuel tank side from a refueling nozzle 18, the movement permitting section deforms so as to permit movement of the stopper 24 toward a radial direction outer side of the nozzle guide 22 or toward a fuel tank side.

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1. A refueling portion structure comprising: an inlet pipe that has, at an upper portion thereof, an insertion port for a refueling nozzle, and whose lower portion is positioned within a fuel tank;a nozzle guide that is disposed at an interior of the inlet pipe, and that guides the refueling nozzle

1. A refueling portion structure comprising: an inlet pipe that has, at an upper portion thereof, an insertion port for a refueling nozzle, and whose lower portion is positioned within a fuel tank;a nozzle guide that is disposed at an interior of the inlet pipe, and that guides the refueling nozzle that has been inserted into the nozzle guide;a stopper that is provided at the nozzle guide, and that is abutted by a distal end of the refueling nozzle that has been inserted into the nozzle guide;a movement permitting section that is provided at the nozzle guide, and that, when the stopper receives a pushing force toward a fuel tank side from the refueling nozzle, deforms so as to permit movement of the stopper toward a radial direction outer side of the nozzle guide or toward the fuel tank side; anda plurality of ribs that are provided at the nozzle guide, project out toward the radial direction outer side of the nozzle guide, and extend in a longitudinal direction of the nozzle guide,wherein the plurality of the ribs include a rib that extends to a lower end portion of the nozzle guide, a second gap between the rib and the inlet pipe at the lower end portion of the nozzle guide being larger than a first gap between the rib and the inlet pipe at a remainder portion other than the lower end portion of the nozzle guide. 2. The refueling portion structure of claim 1, wherein the movement permitting portion has an opposing portion that is provided at a region of the nozzle guide at which region the stopper is provided, and that opposes an inner peripheral surface of the inlet pipe with the first gap therebetween. 3. The refueling portion structure of claim 2, further comprising an inclined surface that is provided at the stopper, and that converts the pushing force into force that moves the stopper toward a radial direction outer side. 4. The refueling portion structure of claim 3, wherein the inclined surface is inclined toward the fuel tank side while heading from a radial direction outer side toward an inner side of the nozzle guide. 5. The refueling portion structure of claim 1, wherein the rib is formed at a position that avoids the opposing portion. 6. The refueling portion structure of claim 1, wherein the nozzle guide has: at the fuel tank side of the nozzle guide, a small diameter portion whose internal diameter is larger than an external diameter of the refueling nozzle;at an insertion port side of the nozzle guide, a large diameter portion whose internal diameter is larger than the internal diameter of the small diameter portion; andan inclined portion whose internal diameter continuously changes from the small diameter portion toward the large diameter portion. 7. The refueling portion structure of claim 6, wherein the stopper and the movement permitting portion are provided at the small diameter portion. 8. The refueling portion structure of claim 1, wherein the movement permitting portion is a flexible portion that is provided at the nozzle guide at further toward an upper side than the stopper, and that permits extension of a portion of the nozzle guide due to the pushing force. 9. The refueling portion structure of claim 8, wherein the flexible portion is a bellows portion at which the nozzle guide is bent in a shape of bellows.