A catalyst for purification of exhaust gases, produced by use of a catalyst component A, a catalyst component B, and a binder, the catalyst component A being produced by supporting Rh on a catalyst support for Rh, having a CO2 adsorption amount per unit weight of from 25 μmol·g−1 to 60 μmol·g−1, and having a CO2 adsorption amount per unit specific surface area of from 0.2 μmol·m−2·g1 to 2.3 μmol·m−2·g1, the catalyst having a CO2 adsorption amount per unit weight of from 18 μmol·g−1 to 60 μmol·g−1 and a CO2 adsorption amount per unit specific surface area of from 0.2 μmol·m−2·g1 to 2.5 μmol·m−2·g1, and a ratio of the CO2 adsorption amount per unit weight of the catalyst to the CO2 adsorption amount per unit weight of the catalyst component A [(CO2 adsorption amount of the catalyst/CO2 adsorption amount of the catalyst component A)×100] being 75% or more.