The study was conducted to assess the level of awareness on HIV/AIDS (Acquired Immune Deficiency Syndrome) and the Influence of different socio-demographic factors among the garment workers in Bangladesh. This cross sectional study was carried out among 303 workers in three selected garment factories in Dhaka city from July 2010 to June 1011. Data were collected by face to face interview through a predesigned questionnaire containing desired information. The majority of workers (76.6%) were within the 17–19 years age group. The female respondents predominated (55.1%). A considerable number of the sample population (39.3%) completed the primary education. But majority belonged to low income group (68.4%), followed by the very low income group (22.4%). Almost everyone (98.3%) except five of the respondents heard the word HIV/AIDS and most of them (90.6%) knew that the disease is transmissible from person to person and mainly by sexual intercourse (78.9%). Only 28.2% had some idea about the sign symptoms of HIV. About (64.4%) thought that persons having heterosexual partners (including prostitutes) are high-risk groups. Though many (74.2%) of the respondents thought that HIV/AIDS is preventable, only 45% said HIV/AIDS is not curable. But 70.5% answered that death is the ultimate fate. The main source of information was radio/TV, newspaper. Unfortunately, 76.9% of the respondents had poor awareness while only 10.6% had good awareness. The level of awareness increased with age (p = <0.05). Though the male were slightly more aware than the female, the relationship is not statistically significant (p= > 0.05). Awareness among S.S.C. passed and above is quite more than the awareness of illiterate (p = <0.01). But there was no relation (p= > 0.05) of level of family income and living pattern with level of awareness. Even being a risk group the garment workers not much aware of HIV/AIDS. The level of awareness increased with age and literacy, which shows the window of opportunity for the policymakers that educational intervention program, may be effective for them.