<p>Disclosed is a carbon dioxide absorbent solution which can absorb carbon dioxide in a large quantity and rarely causes the precipitation of a material produced by the reaction with carbon dioxide. The carbon dioxide absorbent solution is characterized by comprising an aqueous solution and an amino acid salt that has at least one carboxylic acid salt bound to a heterocyclic ring containing at least one nitrogen atom as a ring-forming element and contained in the aqueous solution.</p>
