NOVELTY - A fluorinated amorphous nano carbon fiber (41) contains nano carbon fiber with amorphous structure, and fluorine (in atomic%) (1 or more) other than carbon. The nano carbon fiber has diameter of 1-1000 nm. The ratio of length with respect to diameter of the nano carbon fiber is 5 or more.    USE - For hydrogen storage material used in hydrogen storage apparatus for storing hydrogen used as fuel in fuel-cell apparatus (all claimed) used for generating electric power, hydraulic power, thermal power and nuclear power used for electric and electronic equipment, internal combustion engines of motor vehicles, ships and aircrafts.    ADVANTAGE - The fluorinated amorphous nano carbon fiber has excellent hydrogen occlusion property, and is manufactured easily with high yield. The hydrogen storage material with the fluorinated amorphous nano carbon fiber, has excellent hydrogen storage ability, and effectiveness to internal absorption site, and is manufactured economically and widely used in industries. Aggregation of fiber and desorption of fluorine by heating or pressure reduction are prevented, by the effect of fluorine in the fiber. The fuel-cell system with the hydrogen storage apparatus having the hydrogen storage material, is lightweight and portable.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) manufacture of the fluorinated amorphous nano carbon fiber, which involves storing raw material in a reactor, activating the raw material by heating the stored raw material using oxidizing gas, and heating raw material passed through the activation processing using gas containing fluorine;    (2) hydrogen storage material, which consists of the fluorinated amorphous nano carbon fiber;    (3) hydrogen storage method, which involves occluding hydrogen to 1 or more types of the hydrogen storage material;    (4) hydrogen storage apparatus, which is formed by packing the 1 or more of the hydrogen storage material in a container (43); and    (5) fuel-cell system, which is equipped with the hydrogen storage apparatus.    DESCRIPTION OF DRAWING(S) - The figure shows the hydrogen storage apparatus with hydrogen storage material having the fluorinated amorphous nano carbon fiber fixed on support.    Fluorinated amorphous nano carbon fiber (41)    Support (42)    Container (43)    Filling port (44)    Discharge port (45)