Abstract: The present invention provides a process for detecting Helicobacter pylori using aliphatic amides in which the referred amides are converted into their corresponding acids, when in contact with the bacterium. These acids are volatile or semi-volatile compounds and can be detected in the vapor phase by means of common chromatography techniques. Propionamide or butyramide can be used as amides, forming, respectively, the propionic and butyric acids. Any other non-toxic aliphatic amide can be used. The amides in use can be orally administrated as pills or as a diluted aqueous solution by both genders, any race and age, independently of the coexistence of pathologies associated or not with this bacterium. The invention is used in the development of a new non-invasive process for the detection of H. pylori in the stomach by means of analyzing exhaled air, and can be implemented in the medical and pharmaceutical industry.