A Study on the Employees' Adversity Quotient, Job Stress and Role Performance in High Technology Industry: Perceived Organizational Support as a Moderator. Abstract This study aims to explore the high-tech industry employees: (1) the relationship among adversity quotient, job stress, perceived organizational support and role performance. (2) the adversity quotient as a mediator between the job stress and role performance. (3) the moderating effect of perceived organizational support to job stress and role performacne. For the purposes of the study, the questionnaire survey was conducted for the employees in the south high tech industry. Total 111 supervisor questionnaires and 333 staff questionnaires were distributed to 44 high tech firms, where the role performance questionnaires were designed for pairs of supervisor and employees. And total 110 supervisor questionnaires and 330 staff questionnaires were returned and, after 2 supervisors¡¦ and 12 invalid staffs¡¦ questionnaires eliminated, a total of 108 supervisor and 318 staff valid sets of questionnairs have been collected in this study. The response rate of the valid questionnaires is 96.36%. The study adopts the following statistical analysis techniques: the confirmatory factor analysis (CFA), the reliability analysis, the descriptive statistics, the independent t-test, the one-way ANOVA, the structural equation modeling (SEM), the correlation analysis, and the hierarchical regression analysis. The primary findings are as follows: 1. Adversity quotient has significantly negative effect on job stress. 2. Adversity quotient has significantly positive effect on role performance. 3. Job stress has significantly negative effect on role performance. 4. Job stress has mediating effect on the relationship between adversity quotient and role performance. 5. Perceived organizational support does not have significantly moderate effect between job stress and role performance. This study concludes by discussing for the implications of major findings, which would be a reference to the academy and industries, and make suggestions for further studies. Keywords: Adversity Quotient , Job Stress , Percevied Orgnaizational Support, Role Performance, In-Role Behavior, OCB-Individual, OCB-Organization