Background: Ovarian Leiomyoma accounts only for 0.5 to 1% of all benign ovarian tumors. Here we present a series of eight patients over a six-year period(2012-2018). The clinico-pathological features, diagnosis and management were discussed. Methods: We had experienced eight cases of ovarian leiomyoma.The clinical features,pathologic findings,diagnosis, treatment were reviewed. Results: The mean age of these patients was 38.5 years. The majority of these patients may be asymptomatic and usually diagnosed incidentally during pelvic examination or pathologic examination after surgery. Six cases presented only with pelvic mass sized from 2 to 20 cm and even some patients persisted for more than twenty years while the other two were diagnosed due to four years of primary infertile or three months of irregular vagina bleeding. Three patients coincident with uterine leiomyoma while the others not. Three had ovarian leiomyoma degenerated and one case had a evidence of atypical 4/10. Conclusions : ovarian leiomyoma was very rare but it should be considered in the diagnosis of pelvic or ovarian solid masses. Magnetic resonance imaging was provital in its different diagnose while fast frozen pathology during operation was very necessary for its surgical decision. A proper surgical decision should be made according to patients age.