<p><em>The research was conducted using the method carried out using multiple regression methods, and hierarchical regression. This study aims to obtain empirical evidence about the effect of audit service quality of public accounting firms on client satisfaction, the effect of client satisfaction on client loyalty, and the role of client satisfaction as a mediator of the effect of audit service quality on client loyalty (an empirical study of companies in East Java in Indonesia). . The population in this study are medium-sized companies in East Java. The samples taken were 40 companies in East Java with 63 respondents. The conclusion is that the quality of audit services can affect client satisfaction in using the audit services of a Public Accounting Firm (KAP). Companies in East Java in Indonesia are satisfied with the quality of KAP audit services only from the assurance dimension. The quality of audit services from the dimensions of tangible, reliability, responsiveness, and empathy cannot affect the satisfaction of companies in East Java in Indonesia in using KAP audit services</em><em>.</em></p>