Studies show that 80-90% of losses are caused by human failure, both as individuals and organizations. Yet, only 3.4% of organizations have mature processes in place to actively identify, evaluate, and manage their risks. Safety culture, which has been introduced for more than two decades, has been considered as an effective approach to improve safety performance. Having a positive safety culture is now seen as a prerequisite for, and the basis for, good safety performance. Thus, good safety culture is considered a predictor of good safety performance. However, there are only a limited number of studies that examine the relationship between safety culture and safety performance. This study used a safety culture maturity framework and the level of injury as the variables measured at five sites of PT. X. Data for both variables were secondary data obtained directly from PT.X. The five sites were found to have a statistically significant difference between their injury rates but no statistically significant difference was observed between their safety culture maturity scores. The figure for the safety culture maturity in each site can be considered similar, considering that they have implemented a safety management system for more than two decades. At PT. X, the safety culture maturity alone cannot be considered to have a direct correlation with safety performance. There may be several other factors that contribute to safety performance. However, in sites with a high injury rate, a lower SCM score was identified in twelve elements of safety culture maturity when compared to the sites with low injury rates.