The study aimed to investigate teaching competency of teacher’s with reference to mental health and job involvement. The study also aimed at studying gender differences in these variables. The study was based on a sample of four hundred high school teacher’s, two hundred from each group (males teacher’s, n = 200, female teacher’s, n = 200). Three valid and reliable instruments viz. teaching competency scale validated and standardized by Passi & Lalita (2011), Job involvement scale constructed by Akhtar & Singh (2014) and finally a self constructed tool on mental health of teacher’s were employed for the collection of data from the chosen sample of teacher’s. The findings revealed a significant & positive relationship between teaching competency, mental health and job involvement. Further, a significant mean difference between male and female teacher’s on both teaching competency and their mental health were evidenced. However, a non-significant mean difference was seen in the job involvement of teacher’s in terms of their gender. The study concluded with important recommendations that are too helpful for stakeholders connected with school education.