Enteroclysis is rightly included to modern diagnostic methods for detecting damage to alimentary canal. It enables to visualize even small morphological changes on the mucous membrane of intestine, to prove fistulas if present and to evaluate functional changes if correctly applied. It significantly contributes to establishing early diagnosis in affections of the intestine and consequent use of adequate therapy. The authors in their communication summarized their experience, obtained in the examination of one hundred patients. They selected a modified procedure of examination according to Herlinger with the use of Prontobarium suspension and methyl cellulose. The application was made with a controlled duodenal probe from the Nicholas Company, introduced by nose. The average duration of one examination was 44 minutes.