From April to November 1998 eleven patients (8 female and 3 male, mean age 48.5; range 23-69) with adrenal gland tumor underwent laparoscopic adrenalectomy from the lateral retroperitoneal approach. Authors report their primary experience; introduce their own material and describe the operative technique of laparoscopic adrenalectomy from lateral retroperitoneal approach. Besides one case of Conn syndrome, all tumors were hormonally non-active. In 10 patients the adrenal masses were incidentally discovered during such imaging examination as abdominal ultrasonography and computed tomography. All tumors were benign in postoperative histopathological examination. The localization was unilateral and suprarenal in all cases (7 right, 4 left). Both operation and postoperative course in all patients were uncomplicated. One conversion to "open" procedure had been performed due to laparoscopic equipment damage.