Ovarian leiomyoma is one rare entity among ovarian smooth muscle tumors which account for 0.5-1% of all ovarian tumors. It occurs mainly in premenopausal age group as unilateral, small, benign, solid tumor. Here we present a case in a 45 years old patient presenting with mass abdomen and abdominal pain. Computer tomography revealed a right adnexal solid mass arising from ovaries. Laparotomy was done and specimen subjected to frozen section and found to have appearance of leiomyoma arising from ovaries, further subjected to histopathology and immunohistochemical staining with α-smooth muscle actin, inhibin and desmin and concluded it to be primary ovarian leiomyoma.