The aim of the study was to investigate the effect of job stressors on job performance with mediating role of coping mechanism. The finite Population of the study comprised of 73 female and 97male physical education lecturers' serving in government colleges of Khyber Pakhtunkhwa, Pakistan. Three different types of self-administered cum close-ended questionnaires such as Job Stressors, Job Performance and Coping Mechanism were used for the data collection. Face and content validity was done from the export in the relevant field. To assess the feasibility of the tool; the researcher conducted a small scale preliminary study i.e. a pilot study with 25 lecturers physical education (13 male and 12 female), the subgroup of the intended population. Mean, stander deviation, multiple regressions and Pearson's correlation coefficient used to test the hypotheses. The process v3.3 by Andrew F. Hayes was used for mediation. Results of existing study highlighted that there is a positive and significant relationship and effect among job stressors, job performance and relaxation coping (r=.662; 939 & p=.000 <.01). The mediating role of relaxation coping was found greater and partial. The researcher concluded that there is partial mediating role of relaxation coping between job stressors and job performance of the lecturer's physical education at collage level in KP Pakistan. The researcher recommended that the lecturer physical education may ensure the contribution of the relaxation coping mechanism for the purpose to improve their job performance at college level.