Personal experience of 32 cases of colon diverticula observed between 1972 and 1989 is reported. Nine conservative operations and 23 resections of the perforated segment of the colon, followed 20 times by primary anastomosis, were performed. The importance of removing the sector of the colon involved is reiterated. It is concluded that a sectorial type primary resection-anastomosis is advisable in the case of generalised peritonitis, preceding the operation with an abundant peritoneal wash-out. Protective colostomy can be avoided by using an endoluminal active aspiration tube. In a series of 11 primary resection-anastomosis operations carried out in the presence of general peritonitis, anastomotic dehiscence was never observed.