In the management of organizations, the term employee loyalty is utilized as a key to motivating and maintaining employees with higher efficiency and has a significant impact on well-being, employee effectiveness, attachment and job satisfaction, and organizational performance. The current study seeks to answer the question of whether sustainable human resource management can develop employee loyalty through social capital. In this research, a random sampling method was utilized to select the sample. The sample size in this study was estimated to be 150 people according to Morgan's table. To collect the desired information and measure the research variables, a standard questionnaire was used. The validity of the measurement tool has been verified through content, and its reliability through Cronbach's alpha coefficient. Smart Pls software was utilized to analyze the data. The results of the findings show that human resource management has a direct effect on social capital. In addition, the results of the path analysis showed that sustainable human resources have a significant effect on employee loyalty. Research results show that social capital has a direct impact on employee loyalty. These results can facilitate the improvement of organizations' performance, increase employee satisfaction, and ultimately help to achieve long-term success.
