Abstract: The present invention relates to a surfactant composition based on glycine betaine amide salt and also to the process for preparing the same. The invention also relates to the use thereof as a wetting agent, particle dispersant and/or corrosion inhibitor and/or for improving the disinfectant power and/or the persistence of the disinfectant effect of antimicrobial substances and/or the insecticide effect and/or the persistence of insecticidal substances, and also in the manufacture of various products intended for treating and/or cleansing the body, plants or hard surfaces, for water treatment or for oil extraction. The invention also relates to a product comprising the abovementioned composition.