A small percent of the population in our country suffer chronic constipation, manifested in various degrees. To surgical treatment are subjected patients with severe decompensated forms of constipation, resulting in a general state deterioration, when the systematic conservative treatment failed to give an effect. In five patients, ileosigmoanastomosis below Balli sphincter was performed thus interrupting the pasage through the large intestine. All cases, followed for a period of one to three years, reported regular daily defecation. The results from the carried out control clinical, laboratory, X-ray, endoscopic and microbiological investigations are reported. The author's opinion is that the surgical treatment must be given consideration in thoroughly examined and selected patients with severe forms of chronic constipation.