Aim: Acute diverticulitis is a frequent disease in the Western Countries. The increase number of patients admitted in the Surgery Departments led the necessity of new Scores and Classifications in order to clarify, in absence of clear guidelines, the best treatments to offer in the different situations. Methods: A retrospective study of ninety-nine patients treated in our Department from June 2010 and March 2015. Results: In our study 41 patients were treated conservatively, the remaining 58 were operated, 56 laparotomic and 2 laparoscopic. 5 patients submitted US guided drainage of abscess which failed in 2 cases. 25 submitted Hartmann’s Procedure (HP), 29 Primary Resection and Anastomosis (PRA), 3 Contemporary Closure of Perforated Diverticula (CC) and just 2 Laparoscopic Peritoneal Lavage and Drainage (LPL). We related different Hinchey groups and up-groups with the treatments approached, identifying patients risk factors, ASA score and complications. Discussion: The treatment of perforated diverticulitis is debated. CT scan is becoming an useful instrument to make a correct diagnosis. Hinchey I and II patients are preferentially treated conservatively except in cases of complicated presentations. Hinchey III and IV are necessarily treated with surgical approach. We analyze the different types of intervention currently approached. Conclusion: We believe in PRA in Hinchey III and IV selected patients, HP is the gold standard in higher ASA scores patients but the low number of stoma reversal remains an open problem. Many studies are ongoing concerning LPL and now there are insufficient data to think of a widespread use of this technique.