Benign Migratory Glossitis (BMG) is a benign condition on dorsal lateral of the tongue and asymptomatic with a movable pattern. The characteristic of the lesion is an erythematous patch surrounded by yellowish white bands with elevated and irregular edges. Benign Migratory Glossitis is often found accidentally during routine examination and until now the cause is still unknown. This article presents a case of asymptomatic benign migratory glossitis in a 4 year old boy, because his mother was worried about the condition.