Combined power generation equipment combining a molten carbonate fuel cell (MCFC) and a gas turbine so as to construct a closed cycle system adapted to recover the total amount of carbon dioxide produced during power generation by feeding fuel and only O₂ at an equivalent ratio, thereby obtaining CO₂ as an oxidizing agent of a cathode gas, thus achieving high efficiency of a high order, the combined power generation equipment comprising a molten carbonate fuel cell (MCFC) 2 for performing power generation by the electrochemical reaction of an anode gas containing H₂ and a cathode gas containing O₂, a combustor 3 in which exhaust gas of the MCFC 2 is introduced and combusted, a gas turbine 4 for expanding a combustion gas from the combustor 3, and a circulatory line 15 for mixing CO₂ of the exhaust of the gas turbine 4 into the cathode gas.

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