We present herein on an 89-year-old female patient with perforated obstructive colitis. A gastrographin enema showed the apple-core sign on the rectum as well as leakage of contrast media proximal to that point. The patient was diagnosed as having rectal cancer followed by perforation. She underwent Hartmann's operation. During her postoperative course, polymyxin B direct hemoperfusion treatment was introduced, which was expected to diminish the risk for endotoxemia or sepsis. Neutrophil elastase inhibitor was also administered for her respiratory deficiency. Eventually she overcame her septic condition and was free from the respirator on the seventh postoperative day. However, dehiscence of her abdominal wound occurred revealing the intestines on the fourteenth postoperative day, and a second operation was therefore performed. We examined the Douglas pouch to see why suppurative exudate had been seen via a drainage tube and found out the stump of the resected rectum had completely opened out. An automatically suturing device with 3-layred staple lines was used to repair this deficit. The patient had a good postoperative course and was discharged from our hospital 63 days after the second operation.