Objective To investigate the value of MRI in the diagnosis of ovarian fibroma. Methods The clinical data and MRI findings of 15 patients with ovarian fibroma confirmed by histopathology were analyzed retrospectively. Results All 15 cases had single lesion with well defined smooth margins. Lesions of 8 cases were round, 6 cases were orbicular-ovate, and 1 case was lobulated. Lesions were (6.9±2.5) cm on average. The diameter of 11 cases≥6cm, and 4 cases<6cm; Lesions of 11 cases were solid, of which 4 cases were homogeneous signal (equisignal on T1WI and slightly low signal on T2WI); 7 cases with larger diameter showed unhomogeneous (slightly high signal on T1WI and high signal on T2WI signal, and patchy long signal on T1WI and long edema signal on T2WI inside); 4 cases showed cystic-solid mixed masses (cystic wall and solid part showed equisignalon T1WI and slightly low signal on T2WI), and the wall of cyst was thick and uneven, but the inner wall was smooth without mural nodules; the cystic part showed low signal on T1WI and high signal on T2WI. The solid masses, the solid part and cystic wall of solid-solid masses showed homogeneous mild or moderate delayed enhancement, and the signal intensity increased slowly. The degree of enhancement was weaker than that of the myometrium. The cystic part showed unenhancement. Conclusions The imaging manifestations of ovarian fibroma show certain characteristics. MRI can show lesions' characteristics clearly, and it has important value in preoperative diagnosis of ovarian fibroma.