This study investigated the demographic and high risk behavior characteristics among recently diagnosed pulmonary tuberculosis patients aged 18-40 years old in Jakarta, Indonesia. Three hundred and four participants were recruited voluntarily from two general hospitals. Among the study population, 38.5% were unemployed, 69.7% were in low socio-economic condition, and 69.7% had a high school or higher level of education. About 8% had received a transfusion, 0.3% were intravenous drug users (IVDU) and had sex with other IVDU's no males admitted to being homosexual, 3.2% of males were bisexual, 20.1% (35.5% of males, 4% of females) engaged in extramarital heterosexual intercourse, and 3.6% (7.1% of males) had one or more sexually transmitted diseases (STD). We found very strong associations between gender and extramarital heterosexual activity (p < 0.001, prevalence odds ratio (POR 13.11), between occupation and extramarital heterosexual activity (p < 0.001, POR 3.84), and between extramarital heterosexual contact and a history of an STD (p < 0.001, POR 20.86). High risk activities were common among these TB patients, especially among males. These results suggests that the necessary social conditions for transmission of HIV are common in Jakarta.