A 65-year-old woman with diabetes mellitus (DM) and suffering a cataract in the left eye, that was resistant to Western medical treatment, was treated with goshajinkigan (GJ), a herbal medicinal drug, in combination with eye drops. This treatment remarkably improved the visual disturbance due to the senile cataract. Ten days after commencement of the GJ treatment, her visual acuity did not deteriorate any further. There was also no further deterioration of DM condition. These results suggest that GJ may be valuable in the treatment of diabetic women with cataracts.