Objectives: This study reports a case of COVID-19 in which the patient experienced improved clinical symptoms (fever, cough, anosmia, sore throat, pantalgia, and headache) after treatment with Korean medicine.Methods: A 47-year-old male patient diagnosed with COVID-19 was treated with herbal medicine (<i>Mahwangbalpyotang-gagam</i>) three times a day. His clinical course was assessed using changes in body temperature, the Numerical Rating Scale of clinical symptoms, and chest X-ray comparisons between pre-COVID-19 and post-COVID-19 conditions.Results: All the patient's clinical symptoms subsided in 11 days. After 15 days of treatment, his body temperature dropped to a normal range, and the quarantine was lifted. A chest X-ray showed there was no active lung lesion in either lung field after COVID-19.Conclusion: This study suggests that herbal medicine treatment may be an effective treatment for relieving COVID-19's clinical symptoms.