Employees, hide their knowledge in response to resources that are at risk. Workplace ostracism and Workplace incivility deplete employees' resources and create job anxiety Therefore, this research aims to investigate the effect of ostracism and incivility behaviors at the workplace on the dimensions of hiding knowledge (evasive hiding, playing dumb, and rationalized hiding) and the mediation of employees' job anxiety. The research is applied in terms of purpose and descriptive correlation in terms of data collection. The statistical population of this research was 300 employees of the South Khorasan Governorate. By randomly distributing questionnaires, 150 complete questionnaires were examined. The tools of data collection were job anxiety questionnaires, workplace ostracism, workplace incivility, and a Dimension of knowledge hiding. Hypotheses were tested by the structural equation modeling method in PLS3 software and the Sobel test. The findings showed that workplace ostracism does not affect evasive hiding and playing dumb, but it has a positive and significant effect on rationalized hiding. Workplace incivility positively and significantly affects evasive hiding, dumb playing, and rationalized hiding. Also, job anxiety mediates the relationship between workplace incivility and playing dumb at knowledge hiding. Job anxiety mediates the relationship between workplace ostracism, evasive hiding, and playing dumb. The research results contribute to the current literature on knowledge-hiding behavior and understanding cognitive processes in non-cooperative behaviors, such as knowledge-hiding based on the Conservation of Resources Theory.