A method for recovering CO 2 gas generated in a cement-manufacturing facility which preheats a cement material in a first preheater, then feeds the preheated cement material to a cement kiln having an atmosphere in an inner part held at high temperature and fires the fed cement material, comprising the steps of: feeding the cement material before calcination, which has been extracted from the first preheater, to a regenerative calciner which has been heated to the calcination temperature or higher and has stored heat therein, and calcining the fed cement material therein; feeding the cement material which has been calcined, to the cement kiln; and recovering CO 2 gas generated by the calcination of the cement material in the regenerative calciner, wherein the method further comprising the steps of: providing a plurality of the regenerative calciners; heating at least one of the regenerative calciners to the calcination temperature or higher to store heat therein, while at least one of the other regenerative calciners calcines the cement material; alternately repeating the calcination and heat storage in the plurality of the regenerative calciners, so that the above-described recovering step for recovering the CO 2 gas generated by the calcination of the cement material in the regenerative calciner is performed, wherein the regenerative calciner is filled with a heat medium having a particle diameter larger than that of the cement material. feeding the cement material before calcination, which has been extracted from the first preheater, to a regenerative calciner which has been heated to the calcination temperature or higher and has stored heat therein, and calcining the fed cement material therein; feeding the cement material which has been calcined, to the cement kiln; and recovering CO 2 gas generated by the calcination of the cement material in the regenerative calciner, wherein the method further comprising the steps of: providing a plurality of the regenerative calciners; heating at least one of the regenerative calciners to the calcination temperature or higher to store heat therein, while at least one of the other regenerative calciners calcines the cement material; alternately repeating the calcination and heat storage in the plurality of the regenerative calciners, so that the above-described recovering step for recovering the CO 2 gas generated by the calcination of the cement material in the regenerative calciner is performed, wherein the regenerative calciner is filled with a heat medium having a particle diameter larger than that of the cement material. providing a plurality of the regenerative calciners; heating at least one of the regenerative calciners to the calcination temperature or higher to store heat therein, while at least one of the other regenerative calciners calcines the cement material; alternately repeating the calcination and heat storage in the plurality of the regenerative calciners, so that the above-described recovering step for recovering the CO 2 gas generated by the calcination of the cement material in the regenerative calciner is performed, wherein the regenerative calciner is filled with a heat medium having a particle diameter larger than that of the cement material.