Noise-Induced Hearing Loss (NIHL) was a serious problem caused by the extremely loud sound in the working place. According to the Occupational Health and Safety Administration (OSHA), 22 billion workers in the United States are exposed to NIHL because they are exposed to loud noise at work. This study aims to determine the relationship between age, sex, and the duration of the work to NIHL of miners at PT. Window Andesit Utama (PT. WAU). The method was crosssectional analytic. Primary data collected from a questionnaire, otoscopic, and audiometric exam. Eighty-six miners of the subject taken with simple random sampling. The data were analysed univariately, using a chi-square test. The chi-square test result was tested with Wald Test to determine the effect of the variable. The result showed that 33 workers had NIHL (38,37%), 17 workers (51,52%) were under 40 years old, all 100% were men, and 19 workers (57,58%) worked no longer than 5 years. The number of NIHL case showed a significant score statistically with age (p=0,022, PR=1,850) and duration of the work (p=0,031, PR=1,798). Wald's tests showed that there was not free variable that had an effect on the NIHL.