A 72-year-old woman was admitted for investigation of lower abdominal bloating and melena. She was diagnosed with rectal cancer with ascites, multiple liver metastases, and large bilateral ovarian metastases. The patient underwent bilateral oophorectomy for the ovarian tumors and a Hartmann procedure for rectal cancer. The ovarian lesions were diagnosed as ovarian metastasis of colorectal cancer by histological analysis. Ascites and lower abdominal bloating resolved after the intervention. At 11 months after surgery, the patient is alive and well. Ovarian metastasis from colorectal cancer is relatively rare and associated with poor prognosis. Radical intervention is generally not possible in the presence of metastases, but in the present case, the ovarian tumors were large. It is often difficult to determine the optimal type of invasive surgery, although excision of the lesion may provide palliative relief. In this case, the patient's quality of life improved following palliative resection of the primary colon cancer and ovarian metastases.