Oil filler cap connecting device, oil filler cap assembly and vehicle

The utility model relates to an oil filler cap connecting device, an oil filler cap assembly and a vehicle. The oil filler cap connecting device comprises a fixing ring used for being arranged on an oil filler cap body in a sleeving mode, a mounting base used for being mounted on an automobile body, and a rope part used for connecting the fixing ring and the mounting base, and the rope part comprises a rope body which is at least partially bent to be capable of elastically stretching, a cap connecting end and an automobile body connecting end, thus, the fixing ring and the mounting base are both connected to the rope part, so that flexible connection between the oil filler cap and a vehicle body can be achieved, the oil filler cap is prevented from being lost, meanwhile, the rope body which is arranged in a bent mode and can elastically stretch and retract can expand the moving range of the oil filler cap, and the storage space needed by the rope part is also reduced. 本公开涉及一种加油口盖连接装置、加油口盖总成及车辆，其中，加油口盖连接装置包括用于