This paper sought to determine the impact of School heads' instructional supervision on Teachers' Job Satisfaction. The participants were the Elementary School Teachers in the City Schools Division of City of Malolos, Bulacan. The study made use of standardized instruments as the primary data gathering tool. To gather significant information, two different survey questionnaires were utilized to examine School Head's Instructional Supervision and the Teacher's Job Satisfaction. Regression analysis was used to determine the relationship that exists between variables. The result indicates that School Head's instructional supervision in terms of Designing various interventions is statistically significant with a p-value of 0.043, less than the significance level of 0.05 a while the three indicators (Classroom Observation, Portfolio Supervision, and Identifying Strengths and Limitations) are correlated with teachers' job satisfaction but not to a significant extent. The analysis of variance revealed an F-value of 3.761 with a p-value of 0.008 less than the significance alpha of 0.05. This means that all four predictor variables jointly impact teachers' job satisfaction, but the best predictor is designing various interventions.