The objective of this study was to investigate the impact of lean management components on improved service quality in public hospitals of Kohgiluyeh and Boyerahmad and Bushehr provinces. Fifty thousand employees of public hospitals of Kohkiloyeh-Boyer Ahmad and Bushehr provinces were selected using single-stage random cluster sampling method. Then, a researcher-made questionnaire was used to respond all employees of these hospitals. Structural equation modeling was used to analyze data. Structural equation modeling analyses confirmed the match between research model and experimental data. The results showed that the standard coefficient of all paths of communicative, processes, management, technology, structure, and human components of lean management to improved quality is significant. This means that all components of lean management have a direct impact on improved quality. Lean management leads to improved quality of services in public hospitals of Kohgiluyeh and Boyerahmad and Bushehr provinces.