Objective: Evaluate the perception of cement workers in Guinea on their physical working conditions. Materials and methods: This was a descriptive cross-sectional survey of 112 workers occupying open offices (5 to 10m2), lasting 6 months from August 1, 2021 to January 31, 2022. The GABO questionnaire (Acoustic Discomfort in an Open Office) was used. Results: 112 workers responded to the survey. The male gender was the most represented with an M/F sex ratio of 10.2. Among respondents, 59% shared the workspace with 2 to 6 people; 8% worked alone. Nearly half were moderately satisfied with their workspace (average of 2.88 out of 5). The perception of the comfort of their workspace was good (average 3.17 out of 5). 68.75% felt that the noise in their workspace was high and annoying or even very annoying. The highest source of noise 68.75% and the most annoying 66.97% was the operation of machines. 78.43% felt moderately or even very tired at the end of the day, among them 70.50% had an average recovery capacity of two working days. Conclusion: The results of the study show that working conditions at Cement of Guinea are unsatisfactory. This study should therefore be extended to other companies to be able to improve working conditions in order to prevent the long-term consequences of the various factors that influence the working environment.