Background; Percutaneous transluminal angioplasty(PTA) is an acceptable alternative treatment modality in patients with vascular access failure and we evaluate the immediate results of the procedure. Methods; The introduce sheath was inserted anterogradely or retrogradely according to the stenosis site and perform angiography. If there was thrombus in the vascular access, 200,000 to 400,000 U urokinase was administered and /or thrombus aspiration was performed. Several balloonings were performed at 10 to 20 atms to the goal of technical success (<30% of residual stenosis) and detectable thrill. Clinical success was defined as at least 1 successful hemodialysis session via the treated vascular access. Results; 109 interventions were performed in 49 patients (62.8짹 13.1 year-old) in 26 male patients. Seventy five interventions were performed in 28 arteriovenous graft(AVG) patients (57%), and 34 interventions were performed in 21 arteriovenous fistula(AVF) patients (43%). A simple PTA was performed in 25(51%) patients. PTA and thrombolysis was performed in 8(16%) patients. PTA and thromboaspiration was performed in 7(14%) patients. Five patients(10%) underwent a combination of catheter-directed thromboaspiration, thrombolysis and ballooning. Four patients (8%) underwent PTA and stent insertion. In comparison with the AVF group, the AVG group had higher rate of thrombosis (19% versus 86%, p<0.05). When we compared the duration of patency between AVF and AVG, the duration was 10.37 months in AVF group and 6.07 months in AVG group, showing a higher duration of patency in AVF groups, however, it was not statistically significant. The technical success rate and clincal success rate was 69.4% (34/49) and 85.7% (42/49), respectively. When we compared the technical success rate in thrombosis group, the technical success rate in thrombosis group was 64.3% and 76.2% in non-thrombosis group, with no statistical significance. When we compared the clinical success rate in thrombosis group, the clinical success rate in thrombosis group was 82.1% and 90.5% in non-thrombosis group, without statistical significance. The duration of patency was variable according to the types of the procedures. Surgical revision for stenotic lesion and surgical thrombectomy for thrombotic lesion was done in failed intervention cases. There were no specific complications during the procedures. Conclusion; Percutaneous balloon angioplasty is a acceptable and effective alternative treatment to surgical revision and should be evaluated with large, multicenter long-term study.