By large and giant volume of the spleen the mainstay of the surgery remains the open splenectomy. Splenomegaly stipulates certain difficulties and dangers of the procedure, mainly because the lack of the free space in the abdominal cavity. The maximally wide access, preliminary preparation and ligation of the splenic artery in situ and thorough separation of the spleen and pancreatic tail provide the safety and success of the operation. 374 splenectomies on the reason of the splenomegaly were analyzed. The standartization of the technique allowed the 2.5 times reduction of the postoperative complication rate (from 26.9 to 10.8%); the 1.8 times reduction of the intraoperative complication rate and the 17% reduction of the intraoperative blood loss. The postoperative pancreatitis was registered 4 times rare; the intraabdominal bleeding - 2 times rare and the frequency of the subphrenic abscess was 1.5 times lesser.