Background: Primary Leiomyomas of ovary are rare tumors and account for less than 1% of benign ovarian tumors. Only about 60 cases have been reported in literature out of which most presented in child bearing age group. Case: A 65 year old postmenopausal multipara presented with history of back pain and pain in lower abdomen. Pelvic examination and transvaginal ultrason-ography revealed presence of bilateral ovarian mass. An intra-operative frozen section showed serous cystade-noma in both ovaries with adenofibroma like areas in the left ovary. She underwent Panhysterectomy with Bilateral salpingo-oophorectomy. Histopathologically, a diagnosis of bilateral ovarian serous cyastadenoma with features of ovarian leiomyoma in left ovary was made. Ovarian fibroma-thecoma, cellular fibroma and sclerosing stromal tumour were considered as its differentials and ruled out. The possibility of leiomyos-arcoma was also ruled out. Conclusions: Although these tumors have a benign course and are very rare, they should be emphasized as a possible differential whenever solid ovarian masses are detected.