Tuberculosis (TB) is a major global health problem and is related to poverty, under nutrition and poor immune function. The nutrition education provides guidance on the nutritional care and support for patients with tuberculosis. Current study was aimed to investigate the effect of nutrition education on nutritional status of tuberculosis patients. This was a pre and post interventional study conducted at Gulab Devi Chest hospital Lahore during December 2016 to February, 2017 among 100 patients of pulmonary tuberculosis. Data were collected by filling questionnaire through interview technique to get an insight into on patients' demographics, lifestyle factors and dietary behavior.Patients were counseled about recommended serving of five food groups and role of nutrition in managing disease and thereby improving nutritional status. Data were analyzed using the SPSS version 21.0. Results revealed that 32% males, 35% females were undernourished in pretesting and after three months improvement in BMI occurred i.e. 16% males, 22% females in post testing. Level of significance p= 0.013 increased to p= 0.016. The nutritional knowledge, Hemoglobin (Hb) and erythrocyte sedimentation rate (ESR) of patients improved significantly after three months of intervention (p =0.000). Most of the tuberculosis patients were undernourished and the threat of TB is affected by the nutritional status. Nutrition education had vital role in diagnosis, management and recovery from TB.