Abstract: The purpose of this study to analyze the effect of job stress on performance, the effect of job stress on job satisfaction, the effect of job satisfaction on performance, and the effect of job stress on performance through job satisfaction. Job stress is a condition of psychological distress felt by employees as a result of organizational stressors. Job stress can affect job satisfaction and employee performance. Job satisfaction as a pleasurable or positive emotional state resulting from the appraisal of ones job or job experiences. Using the survey data on 126 employees of PT MAS, data analysis in this research using Structural Equation Model (SEM) in model and hypothesis testing.