Ovarian borderline serous tumors are uncommon. Combination of borderline serous adenofibromatous tumor and prominent micro papillary architecture is not previously reported. We report a case of borderline papillary serous adenofibromatous tumor (also called serous adenocarcinofibroma) with extensive micropapillary pattern in a 27 year-old married woman. She was infertile and presented with diffuse abdominal pain and dysparonia. Bilateral 5.3 and 4.5 cm solid ovarian masses were detected by sonography. Both masses were ovoid with tan-pink bosselated smooth external surfaces, and solid tan lobular cut surfaces. Microscopically, both tumors showed many papillary structures in a fibrotic stroma and contained multiple psammoma bodies. The papillae had broad hyalinized fibrotic stroma with many micropapillary projections arising from the main papilla, lined by mildly pleomorphic cuboidal cells. Mitotic activity was low with no marked nuclear atypia or stromal invasion. No extraovarian implants or metastases were identified.