Present research is conducted with the objective of measuring the impact of work values of school of teachers of senior secondary level on Leadership Behavior (LB). For this work value is considered as independent variable and leadership behaviour is considered as dependent variable. Also work value is divided into 4 sub independent variables: Professionalism and Work Environment (PWE), Collaboration and Teamwork (CT), Personal and Professional Growth (PPG), Work Engagement and Motivation (WEM). Further a tool is developed on which data is collected from the respondents. For development of tool, pilot testing is done 100 sample set on 40 items which was initially narrowed to 23 after statistical analysis. Methods including principal component analysis, varimax rotation with kaiser normalization, explained percentage of variance, and Cronbach's alpha were used to determine the tool's validity and reliability. Finally, regression analysis was used on a larger sample size of 528 to look at how factors including professionalism and work environment, cooperation and collaboration, personal and professional development, and work engagement and motivation affected leadership behavior. Final findings of the research show that, work values have significant impact on leadership behavior.