To provide a desulfurizing agent for a hydrocarbon-containing gas that can be used in the desulfurization of the hydrocarbon-containing gas without being subjected to a previous reduction and can efficiently remove sulfur from the gas to a high degree of desulfurization even at room temperature and to provide a method for producing hydrogen for fuel cells.

The desulfurizing agent is prepared by supporting nickel oxide or both nickel oxide and copper oxide on a support and can be used in the desulfurization of a hydrocarbon-containing gas without being subjected to the previous reduction. The method for producing hydrogen for fuel cells comprises the step of desulfurizing a hydrocarbon-containing gas with the desulfurizing agent and reforming the desulfurized hydrocarbon-containing gas.

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