Paederus dermatitis is a characteristic irritant contact dermatitis caused by paederin which is a chemical substance released by insects of the genus Paederus. Erythematous vesiculobullous eruption with a burning sensation occur within 24 hours after contact with Paederus. This dermatitis is frequently seen in regions with hot, tropical climates such as Africa and the Middle East. There have been a few reports of Paederus dermatitis in Korea. We recently had a patient with Paederus dermatitis who traveled to Kenya. We would like to highlight an awareness of this peculiar dermatitis due to the increasing numbers of travelers visiting tropical countries.