Fast Track" large bowel surgery Introduction: Large Bowel resective surgery requires 6 to 10 days in-hospital stay. Recently the multimodality rehabilitation concept or "fast track" surgery, a combination of different techniques in order to reduce surgical stress, increase recuperation and decrease in-hospital stay, has become an option. Objective: Evaluate postoperative evolution of patients submitted for elective large bowel and rectum resection using "Fast Track" protocol. Material and Method: Prospective Fast track protocol includes all patients submitted for elective large bowel and rectum resection in Military Hospital of Santiago during August 2004 to November 2005. Outcomes concerning postoperative ileus, in-hospital stay, complications and patient satisfaction were recorded. Results: 40 patients, 19 male (48%) and 21 female (52%) consecutive patients were included. Average age 66 years (39-87), 24 patients (60%) were classified ASA II and 38% ASA I. During the first 48 hrs 97.5% had anal flatulence. First defecation occurred before 48 hrs in 47.5% and in 37.5% at 72 hrs. Hospital discharge at 4 th day was possible in 78%. Pain visual analogical scale at 24 hrs was less than 2 in 95%. Satisfaction rate was very good in 70%. Morbidity was 18% without mortality. Anastomotic dehiscence was 2.5%. Conclusions: Fast Track protocol reduces in-hospital stay, pain and postoperative ileus.