Epithelial ovarian cancer (EOC) is the most lethal gynecologic malignancy. Discovery of novel therapeutic opportunities for EOC is important for the improvement of clinical outcome of the patients. Emerging evidence is suggesting that epithelial-mesenchymal transition (EMT) plays a crucial role in the aggressiveness in EOC including increasing migration and invasion ability, contributing to chemoresistance and cancer stem cell populations. Targeting EMT in EOC thus offers an attractive therapeutic option.