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The possibility of carbon fibers use for the removal of H2S from H2S/H2/Ar and H2S/Ar gas mixtures has been studied. Cu-containing carbon fibers and Cu-containing activated carbon fibers proved to be most efficient materials for removing of H2S small amounts in 298-1173 K temperature range at the atmospheric pressure. Depending on the treatment method and the specific surface area and porosity values carbon fibers have different sorption and catalytic properties at different temperatures. H2S sorption from gas mixtures was observed at room temperature while H2S decomposition to H2 and S occurred at elevated temperatures. Cu-containing activated carbon fibers modified by chemical treatment should be used at room temperature. Less expensive Cu-containing carbon fibers can be used at elevated temperatures.