Vulnerable groups (commercial sex workers, truck drivers, truck helpers, daily laborers, rickshaw pullers and drug users) were studied on HIV/AIDS information at Dhaka city and surrounding areas. Mass media was correlated in this research with knowledge on HIV/AIDS transmission and prevention (r = 0.22, p<0.05). Majority of respondents had radio (74%) and television (63.3%). 72.5% respondent never read newspaper and 55% never watch billboard but 31.7% watch television everyday. 95% respondents heard about the name of HIV/AIDS but none of them knew the full meaning of HIV or AIDS, and 87%...