To provide a transparent aldehyde-gas-adsorbing liquid that has high adsorption performance for an aldehyde gas and excellent processability and storage stability. To also provide an aldehyde-gas-adsorbing processed product such as a paper or a nonwoven fabric or fiber exhibiting excellent adsorption performance using the gas-adsorbing liquid.An aldehyde-gas-adsorbing liquid that contains a dihydrazide compound and a metal oxide sol, the content of the dihydrazide compound being 1.3 to 6 mass % relative to the total amount of gas-adsorbing liquid, and the total content of the dihydrazide compound and the metal oxide sol solids content being 18 to 45 mass % relative to the total amount of gas-adsorbing liquid.
