Background: The surgical treatment technique for liver hydatic cyst (LHC) cannot be standardized, and the surgical technique should be tailored according to the extent ofthe cyst and any adjunct complications  of hydatid disease. Liver is the most common site of infection and several methods of surgery have been described to treat this common disease. In this study we aimed to compare the results of two common methods of surgery;simple drainage versus omentoplasty. Patients and methods: Inthis prospective study 25 patients with hepatic hydatid cyst underwent surgery from January 2008 to January 2013. 15 patients were treated with omentoplasty (group I) and the other ten patients were treated with simple tube drainage (group II). The results of surgery including mortality, complications and recurrences were recorded. Results: There was no case of mortality in each group of patients.Postoperative complications were seen in 6.7% of group I, 15% of group II patients. The mean duration of hospital stay was 4.5 and 8.6 days in group I and group II patients. During a mean period of 18.6 month follow up there was no recurrence in each group of patients. Conclusion:  According  to the results of this study we suppose that omentoplasty  of cyst cavity -if feasible- is preferred to tube drainage