This study aims to examine and analyze the effect of service quality consisting of tangible, reliability, responsiveness, assurance, and empathy on customer satisfaction of Occupational Safety and Health Services Company (PJK3) PT. Centra Gama Indovisi. The research method used is a quantitative method with the type of research is a causal study. This research sample amounted to 86 taken by probability sampling method. Data were analyzed by descriptive analysis and multiple linear regression. The results showed that the overall variables of service quality (tangible, reliability, responsiveness, assurance, and emphaty) had a significant effect on customer satisfaction PJK3 PT. Centra Gama Indovisi. Of the five variables : tangible, reliability, responsiveness, assurance, and empathy which have the greatest influence on customer satisfaction is a reliability of 36.1% Keywords: Tangible, Reliability, Responsiveness, Assurance, Emphaty, Customer Satisfaction