NOVELTY - A cathode for a fuel cell comprises: a complex oxide having primarily oxygen ion conductivity; an inorganic material having primarily electron conductivity; and an oxygen dissociation catalyst having greater catalyst activity in the oxygen dissociation reaction than the complex oxide and the inorganic material at a predetermined temperature range.    USE - For a fuel cell (claimed).    ADVANTAGE - The cathode has good oxygen ion conductivity in the intermediate temperature range. It improves the performance of the fuel cells in the intermediate temperature range. It promotes the oxygen dissociation reaction on the cathode at the predetermined temperature range, allowing the oxygen ion conductivity performance and electron conductivity performance to be improved. It affords better action and effects, thus resulting in the fuel cell having improved power-generating performance in the intermediate temperature range. It improves the power-generating properties in the intermediate temperature range.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (a) a fuel cell comprising: the cathode (114) as above; an anode; and an electrolytic membrane (112), with the cathode disposed on one side, and the anode disposed on the other side; and    (b) a method of producing the cathode comprising: supporting the oxygen dissociation catalyst (C) on the complex oxide (B) having the primarily oxygen ion conductivity; physically mixing the complex oxide supporting the oxygen dissociation catalyst with the inorganic material (A) having the primarily ion conductivity; and forming the mixture of the inorganic material and the complex oxide supporting the oxygen dissociation catalyst into a film on one side of the electrolytic membrane.    DESCRIPTION OF DRAWING(S) - The figure schematically illustrates a structure of a cathode.    Electrolytic membrane (112)    Cathode (114)    Inorganic material (A)    Complex oxide (B)    Oxygen dissociation catalyst (C)