P Productivity according to the Big Indonesian Dictionary is the ability to produce something. The value of worker productivity in terms of several factors shows a value of 66.4 %. occupational health and safety Knowledge will provide understanding and awareness in avoiding accidents and occupational diseases. If the number of workplace accidents decreases, the number of work productivity will increase and vice versa. This research was conducted at the Tamansari Iswara apartment construction project, Cut Meutia Street, Bekasi from Oktober to November 2018 The sampling method was consecutive non random sampling and analyze with Fisher exact test and a total sample of 75 respondents who had met the inclution criteria. Data was collected using a questionnaire for primary data collection obtained from filling the respondents' identity sheets, and filling out questionnaires. Fisher exact test analysis showed that there was a significant correlation between occupational health and safety knowledge with the productivity of construction workers. The results were p = 0.011. From this study, it was concluded that there was a significant correlation between occupational health and safety knowledge with productivity of construction workers.