Percutaneous litholapaxy is a non-invasive method in the surgery of kidney-stones. We prefer the one-step-proceeding--the punction, the dilatation and the intrarenal instrumentation in one session. With this method in 24 cases we have dislocated 9 pelvic-stones, 13 calix-stones and 3 upper ureteral stones which could not remove themselves. Postoperative 4 patients had small residual-stones, 2 of them removed spontaneously without colics still in time of the hospitalization. Thinking of the minimal morbidity and invasiveness we mean, we can recommend the percutaneous stone-removing to our patients with nephrolithiasis after an exact exploration in the future, too.