Indonesia is one of the countries that contribute the most mortality of TB in the world. The tuberculosis treatment success rate in Indonesia is 86% meanwhile is still far from the target coverage of the TB treatment success rate (90%). This study conducted to determine the determinant factors of successful TB treatment in Puskesmas Singosari. A cross-sectional design study was constructed for this study and used SITB and form TB as a research instrument. The population of this study were all drug-susceptible TB patients who had completed treatment at the Puskesmas Singosari in 2020, 2021, and QI-QII in 2022. The sample of this study was 71 people from 99 total population. The dependent variable is the success of drug-susceptible TB treatment. Independent variables are sex, age, weight, regular use of anti-tuberculosis drugs, and comorbidities. The data processing and analysis are being conducted using SPSS software. Chi-square analysis showed that the variable weight changes have a significant assosiation to successful tuberculosis treatment (p = 0,014; OR = 9,818). Puskesmas Singosari's TB Team can collaborate with the nutritionist team to optimize TB treatment by monitoring nutritional status and weight gain of drug-susceptible TB patients.