Trichuris trichiura infection is a common helminth infection, which is transmitted via soil, with worldwide distribution, especially in rural areas of developing countries. Occasionally, sporadic cases occur in non-endemic, developed areas due to the widespread of immigration. We experienced a case of Trichuris dysentery syndrome in a young North Korean defector, who had been suffering from chronic abdominal pain for 10 years. He is relatively short and thin compared with his older brother. Unexpectedly, the diagnosis, made by a colonoscopy, revealed numerous, small, white, and gently moving worms at the cecum and ascending colon. After 3 days of albendazole (400 mg once daily) administration, clinical symptoms subsided dramatically. On the follow-up colonoscopy, which was performed two months after the completion of his treatment, complete eradication was identified. Soil-transmitted hel-minths, including Trichuris trichiura, are disappearing becoming less prevalent in South Korea as a result of both national driving force and environmental improvement. However, these diseases should be considered when we meet foreign patients from developing countries, like North Korea, presenting chronic abdominal pain. Moreover, proper treatment of North Korean defectors and performing cohort studies of them would help to prepare for the possible unification era in the field of gastroenterology.