We herein report an extremely rare case of a solitary metastasis to the spermatic cord from colon cancer. A 71-year-old man who had undergone a right hemicolectomy for stage II cecal cancer 12 months prior, and who had not received adjuvant chemotherapy, was found to have a mass in the right groin region. Computed tomography (CT) revealed that the right spermatic cord was involved in a heterogeneously enhanced mass that measured 37 mm in diameter. A right high orchiectomy was performed. Histological examination of the resected tumor revealed well-differentiated adenocarcinoma compatible with a metastasis from colon cancer. The patient has been doing well, without recurrence, for 15 months postoperatively. To our knowledge, this is the 9th case of a solitary metastasis to the spermatic cord from colon cancer to be reported in the Japanese literature. The survival data of the collected cases suggest that resection of the solitary metastasis to the spermatic cord from colon cancer improves the patient prognosis.