Tuberculosis (TB) is commonly associated with poverty and under-nutrition in both developed and developing countries. Being underweight has been associated with a higher risk of tuberculosis in several studies. A retrospective descriptive study was conducted to analyze TB surveillance data from the chest clinic teaching hospital Batticaloa, in SriLanka. Finally, 103 TB patient’s records were analyzed and available data were extracted. The prevalence of underweight among TB patients is 39(37.9%). Obesity and overweight were associated with a significantly lower risk of both clinically active and culture-confirmed tuberculosis