Background: Abnormal uterine bleeding (AUB) is an important cause of health hazard in perimenopausal women. Accurate diagnosis for the causative factor of AUB in this age group is of utmost importance so that appropriate management can be established. Objective pf present study was to estimate the diagnostic accuracy, efficacy, sensitivity and specificity of transvaginal ultrasound in evaluation of uterine cavity lesion in perimenopausal women with abnormal uterine bleedingMethods: This is a prospective study. This study was carried out in the Department of Obstetrics and Gynecology of Mahatma Gandhi Medical College and Hospital, Jaipur. We included 50 patients of perimenopausal age group who attended the gynecology department with the complaint of AUB. After selecting the patients who fulfill the eligibility criteria in the OPD detailed clinical history, obstetrical and gynecological history taken and detail clinical examination was done as per proforma followed by TVS.Results: In the present study, maximum no of cases between age group of 40 to 44 with 48%, and 38% of cases between age group of 45-49 yr. This suggests abnormal uterine bleeding is common in perimenopausal women. In present study overall sensitivity, specificity, PPV, NPV of TVS were 76%, 94%, 76% and 94%.Conclusions: In conclusion, abnormal uterine bleeding which often prevails as an important and common gynecological ailment. The Sensitivity, Specificity, PPV, NPV of TVS was 76%, 94%, 76% and 94%. The result showed that Transvaginal sonography has a moderate diagnostic accuracy in detecting endometrial hyperplasia and other intrauterine pathology. TVS is safe, acceptable and easily available in most secondary and tertiary care setting and is noninvasive. It should be continued as 1st line diagnostic tool in patients with AUB in perimenopausal women.