This study was conducted to investigate the mediating role of Social Loafing and job insecurity in the impact of organizational forgetting on organizational commitment in government agencies. For this purpose, for measuring organizational forgetfulness, a questionnaire by Aledo Ru?z et al. (2013), for measuring job insecurity, a questionnaire by Ouyang et al. (2015), for measuring social embarrassment of employees, using a questionnaire by Karadal & Saygin (2013), and for measuring organizational commitment. The standard questionnaire of Allen & Meyer (1990) was used and the research questionnaire was distributed among 375 sample of the statistical population, which are all managers and employees of governmental organizations of Fars province. The research method was descriptive correlational. Structural equation analysis and partial least squares (PLS) method were used to answer the research questions and research hypotheses using Smart-PLS software. The results show that organizational forgetting has a significant and negative effect on job insecurity and Social Loafing. The results also show that job insecurity has a positive and significant effect on Social Loafing. Results of Social Loafing on Organizational Commitment and Impact of Organizational Forgetting on Organizational Commitment with regard to Mediation's Role Mediation, but Does Not Confirm the Impact of Job Insecurity on Organizational Commitment, and Effect of Forgetting on Organizational Commitment with Mediating Role of Job Insecurity .