Introduction: Employees in hospitals and polyclinics, which are considered basic and superior industries of the service industry, are widely exposed to burnout due to demanding work conditions. This is especially exacerbated in psychiatric hospitals. Because treatment in these centers requires continuous contact and engagement with many clients and patients, which necessitates working more than the required hours. As a result, it strengthens the tendency towards work addiction. Considering the enlargement of the healthcare sector in the country and the growth in the number of employees in this sector, conducting such research is greatly important. Therefore, the present study attempts to examine the relationship between workaholism and occupational burnout, focusing on the mediating role of psychological capital among employees in the healthcare industry. 
 Method: This is quantitative research that was carried out using the survey method. The population of the study includes all social workers and medical staff at Ibn Sina Psychiatric Hospital in Mashhad, totaling 420 participants. A simple random sampling method was employed to select a sample size of 201 individuals as the sample size. Data were collected using the Maslach Burnout Inventory (2001), Luthans' Psychological Capital Questionnaire (2007), and the Spence and Robbins Workaholism Scale (1992). The validity of these research instruments in Iran has been proven in previous research. Moreover, their reliabilities were established through internal consistency by means of Cronbach's alpha coefficient. The values for burnout, workaholism, and psychological capital were.82,.80, and.74 respectively. Descriptive data were analyzed using SPSS software and the relationships between research variables were examined through structural equation modeling (SEM) using Amos software. 
Findings: Based on the research findings, there is a positive and significant relationship between workaholism and psychological capital with a coefficient of 0.75. The results also indicate that there is a negative and significant relationship between workaholism and burnout with a coefficient of -0.32.  Furthermore, the psychological capital negatively and significantly impacts burnout with a coefficient of -0.59. According to the coefficients in the model, the psychological capital and workaholism variables can explain 0.72 of the variance in burnout among the social workers and medical staff. 
Conclusion: Special job conditions cause hospital employees to experience burnout. The consequences of this can be detrimental to human resources. Based on the research findings, this study concludes that workaholism and psychological capital contribute to a decrease in burnout. The nature of workaholism in hospitals and the psychological capital that is strengthened through the support of managers can alleviate job burnout among the personnel of healthcare industry.