Background: Cesarean section (CS) is one of the most common surgical procedures in women. A recent study documented that Egypt ranked 3^rd among world countries with an estimated rate of CS of 51.8%. Objective: We aimed to evaluate uterine scar after cesarean section (CS) by transvaginal ultrasound (TVS) versus hysterosalpingogram (HSG). Patient and methods: This cross-sectional studywas conducted on 38 patients after obtaining their approval to evaluate CS scar 3 months after delivery using TVS compared to HSG. The study was conducted in Obstetrics and Gynecology Department, Menoufia University in the period between January 2019 and January 2020. Results: Uterine scar defect was identified in 21 cases by HSG (55.3%), while TVS was able to identify it in only 13 cases (34.2%).  Compared to HSG, transvaginal ultrasound had sensitivity and specificity of 61.9 and 100% respectively in detecting scar defects, with an accuracy of 78.94%, Conclusion: Along with increased radiological expertise expected with time, TVS will be more comparable to HSG and appears to be a promising tool in evaluation cesarean scar defect as it has significant agreement with HSG.