A carbon dioxide recovery apparatus, comprising: an absorber which brings a gas into contact with an absorbing liquid (A2,A2') and to allow the absorbing liquid to absorb carbon dioxide contained in the gas, the absorber having a first absorbing section and a second absorbing section which are partitioned and arranged to supply the gas through the first absorbing section into the second absorbing section; a regenerator which regenerates the absorbing liquid (A1,A1') by heating the absorbing liquid having carbon dioxide absorbed in the absorber to cause the absorbing liquid to release the carbon dioxide, the regenerator having a first regenerating section having an external heating implement and a second regenerating section being partitioned from the first regenerating section and arranged to be heated by heat from gas discharged from the first regenerating section; a circulation mechanism comprising a circulation system (L1,L2,L2',L7,L7',L8,L9) having a supply path (L1,L2,L2',L8) for supply from the second absorbing section to the first regenerating section and a return path (L7,L7',L9) for return from the first regenerating section to the second absorbing section to circulate the absorbing liquid between the second absorbing section and the first regenerating section, and a branch flow system (L3-L6,L3',L6',L6",L10-L12) branched from the supply path of the circulation system to cause a part of the absorbing liquid circulated in the circulation system to flow from the second absorbing section through the first absorbing section and the second regenerating section successively and be joined with the rest of the absorbing liquid to be supplied to the first regenerating section; a cooler which cools the part of the absorbing liquid (A2') to be supplied into the first absorbing section in the branch flow system; a compressor which directly compresses a recovery gas discharged from the regenerator and containing carbon dioxide and steam; and a heat recovery system (41a-41c) which recovers heat of the recovery gas compressed by the compressor and supplies the heat to the regenerator. an absorber which brings a gas into contact with an absorbing liquid (A2,A2') and to allow the absorbing liquid to absorb carbon dioxide contained in the gas, the absorber having a first absorbing section and a second absorbing section which are partitioned and arranged to supply the gas through the first absorbing section into the second absorbing section; a regenerator which regenerates the absorbing liquid (A1,A1') by heating the absorbing liquid having carbon dioxide absorbed in the absorber to cause the absorbing liquid to release the carbon dioxide, the regenerator having a first regenerating section having an external heating implement and a second regenerating section being partitioned from the first regenerating section and arranged to be heated by heat from gas discharged from the first regenerating section; a circulation mechanism comprising a circulation system (L1,L2,L2',L7,L7',L8,L9) having a supply path (L1,L2,L2',L8) for supply from the second absorbing section to the first regenerating section and a return path (L7,L7',L9) for return from the first regenerating section to the second absorbing section to circulate the absorbing liquid between the second absorbing section and the first regenerating section, and a branch flow system (L3-L6,L3',L6',L6",L10-L12) branched from the supply path of the circulation system to cause a part of the absorbing liquid circulated in the circulation system to flow from the second absorbing section through the first absorbing section and the second regenerating section successively and be joined with the rest of the absorbing liquid to be supplied to the first regenerating section; a cooler which cools the part of the absorbing liquid (A2') to be supplied into the first absorbing section in the branch flow system; a compressor which directly compresses a recovery gas discharged from the regenerator and containing carbon dioxide and steam; and a heat recovery system (41a-41c) which recovers heat of the recovery gas compressed by the compressor and supplies the heat to the regenerator.