We treated successfully 16 patients with stones in the mid ureter, that is overlying the pelvic bone, in the prone position with a Dornier HM3 lithotriptor. The lithotriptor was equipped with the original reflector and generator system, and all treatments were performed with only surface anesthesia of the skin and premedication with pethidine chloride and diazepam. Between 1 and 3 sessions were necessary with up to 2,000 shock waves at each session. The generator voltage was varied between 14 and 18 kv. After completion of extracorporeal shock wave lithotripsy all patients became free of stones without ureteroscopy or transureteral manipulation except for a ureteral catheter and fluid irrigation during treatment.