Two kinds or intraprostatic stent (Prostakath and Nissenkorn catheter) were inserted under local anesthesia in 17 patients for 20 times who had benign prostatic hyperplasia. Within 1 month after insertion of the stents. the results are good in 10 of 17 patients. fair in 4 and poor in 3 from the view points of improvements in urine flow and voiding symptoms. Of 9 patients in whom the stents have been inserted longer than 6 months. 4 are good. 2 are fair and 3 are poor in the results of long term insertion. It seems that this method is applicable as s definitive method for benign prostatic hyperplasia if there is a few progressions in the location where this stent is inserted. in the quality or stent material and in the easy way to change the stent.