PROBLEM TO BE SOLVED: To provide a carbon dioxide recovery device that recovers carbon dioxide of exhaust gas discharged from a cogeneration device and supplies the recovered carbon dioxide to a plant cultivation facility and that prevents supply of carbon monoxide to the plant cultivation facility.SOLUTION: A carbon dioxide recovery device 1 for recovering carbon dioxide included in exhaust gas discharged from an internal combustion engine (engine) 22 that drives a power generator 20 of a cogeneration device 10 and supplying the carbon dioxide to a plant cultivation facility (house) 2 includes: adsorption tanks 60 in which first adsorbents 72 are accommodated； and a storage tank 62 in which second adsorbents 74 are accommodated. The exhaust gas is pressure-fed to the adsorption tanks to adsorb the carbon dioxide to the first adsorbents, and by reducing the pressure inside the adsorption tanks, the carbon dioxide is desorbed from the first adsorbents, is pressure-fed to the storage tank 62, is adsorbed to the second adsorbents 74 for storage, and then is supplied to the plant cultivation facility. Based on a concentration of carbon monoxide detected by carbon monoxide detection means, the exhaust gas is released to the atmosphere.SELECTED DRAWING: Figure 1
