To provide a process for concentrating and recovering a surfactant aqueous solution, by which a surfactant aqueous solution can be evaporated and concentrated while suppressing foaming, and a surfactant aqueous solution in which the concentration of the surfactant is increased, can easily be obtained with high efficiency. A process for concentrating and recovering a surfactant aqueous solution, by evaporating and concentrating a surfactant aqueous solution containing a gasifiable surfactant and an aqueous solvent to increase the concentration of the surfactant, which comprises storing the surfactant aqueous solution in an evaporator 12; adjusting the temperature of the surfactant aqueous solution in the evaporator 12 to be lower than the boiling point of the aqueous solvent under the pressure in the evaporator 12; withdrawing a part of the surfactant aqueous solution from the evaporator 12, superheating it by a superheater 14 under conditions that all the surfactant and the aqueous solvent are formed into an
