Abstract: Objective To evaluate the accuracy and predictive values of transvaginal ultrasound and hyste-roseopy in endometrial polyp's patients.Methods 160 patients with abnormal vaginal bleeding or of infertility were evaluated by transvaginal ultrasound and hysteroseopy,followed by biopsy during hysteroscopy and histopathology.The sensitivity,specificity,negative predictive and positive predictive values of the procedures were calculated and com-pared.Results Transvaginal ultrasound were 41.38%,98.4%,58.62%,1.53%,0.40 respectively.Those of hyste-roscopy were 96.55%,96.95%,3.13%,3.05%,0.94 respectively.Conclusion The hysteroscopy serves as the golden standard in the diagnosis of endometrial polyp.