ABSTRACT Background Tuberculosis (TB) is a problem in developing countries, because the rate of disease incidence is still high and included in the big 10 leading cause of death in the world. As TB prevalence cases increase, community participation in finding new TB cases is very important. The method that used by various countries is by community-based case finding or Active Case Finding in the community (Active Case Finding). Purpose Evaluating the program implementation in the discovery of new TB cases by TB careworker at the health center in an effort to control TB in DIY (Daerah Istimewa Yogyakarta, DIY). Method This type of research is a quantitative survey. The subjects are TB worker in Puskesmas Yogyakarta, as much 120 people. The instrument used was a questionnaire containing ways of case finding, knowledge, behavior, case finding constraints, types of activities, and main tasks. The analysis uses frequency distribution and is presented in tabular form. Result TB worker in Puskesmas DIY have taken several ways in carrying out new TB case finding; such as Active Case Finding, Pasive Case Finding, knock on the door, counseling, screening and screening. There are some obstacles in the implementation of the discovery of new TB cases; such as limited time and lack of personnel, lack of budget, multiple task burdens, and some areas that do not yet have cadres. The majority of TB careworker are nurses (90%). The aim of new TB cases found in DIY Province was only 48.3% from the target.