BACKGROUND: Tuberculosis remains an important issue of children health, particularly in developing countries. Body Weight is one of the tuberculosis symptoms and used to identified children tuberculosis scoring in Indonesia. AIM: The study aims to get an overview of body weight and body weight increment during oral anti-tuberculosis in Medan, Sumatra Utara. METHODS: Medical records of children with tuberculosis in the Haji Hospital of Sumatra Utara located in Medan during January 2018 till July 2018 were compiled for the children characteristic, body weight before and after oral anti-tuberculosis treatment. RESULTS: There were 99 children medical records included in the study, 42.4% children 1 to 5 years old treated as tuberculosis. At the early treatment, many children were in severe malnutrition (85%). However, after 6 months of tuberculosis treatment, there were many children (78%) got their body weight increment. CONCLUSION: Body weight is an important sign and symptom of children with tuberculosis.