The authors of this study have examined some experience gained in surgically treating 151 patients with bilateral pulmonary hydatid disease in 1991 to 2001, i.e. over 11 years. The examinees were divided into 7 groups. A hundred and forty patients underwent 205 surgical interventions. With this, organ-preserving operations and resections were made in 198 and 7 cases, respectively. Postoperative complications were observed in 12 cases. There were 3 fatal cases in the postoperative period.