NOVELTY - A heating gas contacts a nickel group catalyst (1). Methane present in the gas is transformed into carbon monoxide and hydrogen. Electrodes (12a,12b) contact the modified gas. Carbon monoxide and carbon dioxide present in the gas occludes at the electrode (12a) as carbonate. Water in gas is transformed into hydrogen, during reformation of gas. The electrode (12b) contacts an ion supply source substance (13).    USE - For reformation of gas in fuel system, of a fuel cell electricity generation system.    ADVANTAGE - Reformation efficiency of heating gas in a fuel supply of a fuel cell electricity generation equipment is improved. Continuous gas reformation is performed. Carbon dioxide emission corresponding to electricity generation is reduced.    DETAILED DESCRIPTION - A heating gas contacts a nickel group catalyst (1) at constant temperature. Methane present in the gas is transformed into carbon monoxide and hydrogen. Electrodes (12a,12b) contact the modified gas. Carbon monoxide and carbon dioxide present in the gas occludes at the electrode (12a) as carbonate, during isolation fixation. Water component present in the gas is transformed into hydrogen by impressing a voltage between the electrodes, during reformation of gas. The electrode (12b) contacts an ion supply source substance (13).    INDEPENDENT CLAIMS are included for the following:    (1) A gas reformer of a fuel supply system. The reformer has a pipe for circulating the heating gas. A component forms a lattice which supports nickel group catalyst which transforms methane in the gas into carbon monoxide and hydrogen. Outside face of the electrode (12b) is formed in the form of a device. A solid electrolyte (11) contacts the outside surface of the electrode (12a). The electrode (12a) covers the solid electrolyte. The hollow surface of the electrode (12b) is provided by ion supply source (13). The solid electrolyte is a sodium ionic conductor. The ion source is sodium carbonate, sodium hydrogen carbonate or sodium hydroxide. Power is supplied during gas reformation; and    (2) A gas reformation unit.    DESCRIPTION OF DRAWING(S) - The figures show the explanatory drawing of the principal of gas reformation and the outline composition of solid electrolyte equipped with the electrodes. (Drawing includes non-English language text).    Catalyst (1)    Solid electrolyte (11)    Electrodes (12a,12b)    Ion supply source (13)