The case finding of pulmonary TB and health careseeking become a significant public health concern. Health care-seeking delay is the most important negative risk factor for the spread of TB. This study aims to identify the determinants of health care-seeking behaviour in pulmonary TB patients in Perumnas II Health Center, Pontianak City. The research method used in the study was cross sectional design, and a total of 42 pulmonary TB patients was taken. The results showed that 57.10% had delayed health care-seeking. Perceptions of illness, family support, and mass media exposure were significantly associated with the delay in health care-seeking behaviour. Unrelated variables were age, gender, education level, occupation, income, and access to health services. It is urgent to do comprehensive targeted intervention to overcome care-seeking delay.