MR examination plays important roles in gynecology because of its high tissue contrast. It can be considered appropriate to investigate benign diseases of the uterus and ovaries as it has no radiation exposure, nor pain. The field of view is wide enough to cover the whole pelvis. Qualitative diagnosis is mostly required for the treatment of uterine mesenchymal lesions or ovarian mass lesions using MRI, because biopsy is not usually performed for these lesions. I will address on some common benign diseases of the uterus and ovaries, as well as generally accepted treatments of these lesions, including less invasive surgery.