ABSTRACT This study aims to examine the role of psychological capital as a mediator in the relationship between psychological climate and Jop involvement. A random sample on 366 workers in governmental hospitals is applied. the results show that psychological Climate had positive direct effects on both psychological capital and Jop involvement. Furthermore, psychological capital had a positive direct effect on Jop involvement. The study's major hypothesis that employees' psychological capital mediates the relationship between Psychological Climate and Jop involvement was also supported. The current study included discussion, practical implications, limitations, and suggestions for future research.