The purpose of this study was to report a case of an insomnia patient treated with a traditional Korean medical treatment. The patient had suffered from insomnia for 4 months and had taken medicines such as Zolpidem. We diagnosed the patient as So-yang-in, according to the Sa-sang constitutional medicine. We prescribed medicine with herbs for So-yang-in and applied acupuncture for 9 days, and then we evaluated sleep time, quality, and awakening, based on the patient's statement. The symptoms of insomnia were gradually improved during treatment. Therefore, traditional Korean medical treatment can help insomnia patients sleep well without Zolpidem.