This study aims to determine the level of passenger satisfaction at the Sinar Jaya Bus, Purwokerto - Bekasi route. The population in this study were Sinar Jaya bus passengers. The sample used in this study were 100 respondents. Methods of data collection using questionnaires and conducting direct interviews with respondents. The method used to measure the quality of service is using the SERVQUAL method, with five dimensions of service characteristics, namely, physical evidence, care, reliability, responsiveness, and assurance. From the results of data processing, it is found that the average value of service quality is 3.58 which on the Likert scale can be categorized as quite satisfied while for the hope of getting a service quality value of 4.57 which on the Likert scale can be categorized into category satisfied. Based on the results of the analysis, the average gap value obtained from the data resulting from the reduction of reality and expectations is -0.99. From these data it can be concluded that the PO Sinar Jaya bus has not provided service satisfaction according to the wishes of the passengers.