Objective To assess the efficacy and safety of transurethral bipolar electrocautery resection of the superficial bladder tumor(Bipolar-TURBt).Methods 26 patients with superficial transitional cell carcinoma(13 with tumors appear at the lateral wall) were treated by bipolar TURBt. All patients were followed-up in 1～6 months postoperatively.Results The duration of the procedure was(19?10) min(8～35 min) with little bleeding. Bladder perforation was occurred in no case. No TUR-syndrom was found. The adductor reflex was not found even in the 13 cases with tumor located at the lateral wall.Conclusion Transurethral bipolar electrocautery resection of the superficial bladder tumor is effective and safe.