Abstract: A tank cap for closing a fuel supply port of a fuel tank is provided on its upper surface with a key hole and a cover for covering the key hole. The cover opens and closes the key hole by making the cover swing via a support shaft. Finger catch concave portions are formed at least on both sides of the cover in an axial direction of the support shaft, and each of the finger catch concave portions is structured such that it is possible to insert a finger thereinto and to pinch both side edges in the axial direction of the cover by the inserted finger. Further, a leading end portion of the cover is preferably formed in a tapered shape in plan view.

Abstract: Disclosed is a tank cap of a fuel tank which can easily open a cover covering a key hole. A tank cap for closing a fuel supply port of a fuel tank is provided on an upper surface of the tank cap with a key hole and a cover covering the key hole. The cover opens and closes the key hole by making the cover swing via a support shaft. Finger catch concave portions are formed at least on both sides of the cover in an axial direction of the support shaft, and each of the finger catch concave portions is structured such that it is possible to insert a finger thereinto and to pinch both side edges in the axial direction of the cover by the inserted finger. Further, a leading end portion of the cover is preferably formed in a tapered shape in a plan view.