A hydrogen fill inlet structure for a fuel cell vehicle includes a hydrogen cylinder for filling hydrogen gas from a hydrogen fill inlet. A fuel cell is provided for generating electrical power utilizing hydrogen gas supplied from the hydrogen cylinder. A motor is provided for generating propulsive power for supply to a drive wheel based on electrical power generated from the fuel cell. The hydrogen fill inlet is separate from a source port of the hydrogen cylinder, and is installed in the vicinity of the source port. The hydrogen fill inlet structure may be installed within the diameter of the hydrogen cylinder as viewed axially along the tank. In addition, a cover member is provided for covering the hydrogen cylinder. A lid is installed on a section in proximity to the source port and hydrogen fill inlet of the cover member.