Mental well- being of women in the workplace is ever more recognized as a vital aspect of organizational health, especially in the contexts where institutional strength and gender equality intersects. This study endeavors to investigate how Gender Equality (GE) mediates the relationship between Strong Institutions (SI) and Mental Peace (MP). The study was among the private sector working women in Kerala. Drawing on data collected from 450 respondents across three major districts- Thiruvananthapuram, Trissur and Kozhikode - the research seeks to understand how the psychological well-being of women in the workplace is impacted by institutional strength and workplace gender dynamics. The results affirm that the mental well-being of working women in the private sector is independently and positively influenced by both strong institutions and gender equality. Moreover, the study concludes that gender equality mediates the positive relationship between strong institutions and mental peace. It draws attention to the role of organizational gender equality practices as both a structural and psychological shield in the workplace. The findings of the study highlight the need for organizations to invest in drafting and executing gender equality policies to encourage a peaceful work environment for women employees.