Nowadays, achieving the organizational goals greatly depends on proper performance of the employees (
1). Management experts argue that human resource (HR) is the main asset of any system and organization (
2). This issue gains an added importance when the subject matter is service organizations such as hospitals which deal with the health and treatment of people in the community (
3). For many years, justice has been among the most fundamental issues in human life, and the methods by which it was achieved and implemented have been of great importance (
4). The term organizational justice was coined by Greenberg, and it means fair and equitable behaviors of organizations towards their employees (
5). Three types of organizational justice have been identified by researchers and organizational theorists, which include procedural, transactional, and distributive justice (
6,
7). Procedural justice is defined as the perception of fairness of the decisions made by those affected with the allocation of benefits or compensation. Interactional justice refers to people’s perception of the quality of behaviors while performing organizational procedures. Distributive justice is perceptible provided that rewards and benefits are fairly allocated in addition to fair payments (
8). This former dimension of justice is rooted in Adams’ equity theory (
9). According to this theory, if the employees find that there is no fair equilibrium between the time and effort they put in to perform their duties and the salary they receive from the organization, then they attempt to compensate this injustice by making changes in their behavior and, therefore, the quality of work done by them is affected (
9). In this regard, Wong et al. as cited in Ayub et al. argue that reducing nurses’ perceptions of organizational justice and low trust among colleagues double the risk of infection in patients because these factors affect the behavior of employees and lead to inattention to patient’s clinical conditions (
10). Another factor influencing the success and productivity of an organization is organizational citizenship behavior, which is related to the role of HR in performing tasks beyond organizational expectations (
11). The concept of organizational citizenship behavior was first introduced and defined by Organ and Konovsky (
12). According to Organ and Konovsky, organizational citizenship behavior is an individual and voluntary behavior that is not designed directly by the official reward and punishment systems in the organization but rather promotes the effectiveness and efficiency of the organization’s performance (
12). Employee citizenship behavior has a significantly positive effect on the level of individual and organizational performance of employees (
13). In this regard, the results of a recent study in Wuhan, China, have shown that an appropriate organizational citizenship behavior is effective in promoting work engagement, optimism in the workplace, and focus on the tasks, generally improving the efficiency of organization and the quality of nurses’ work (
14). Another important and key variable in this research is organizational trust of employees. In an attempt to offer a comprehensive definition, Shockley-Zalabak et al. define trust as “believing in close friends and others because we are dependent on others to achieve our request and desire” (
15). They describe the construct of organizational trust as positive expectations individuals hold about the intent and behaviors of multiple organizational members based on experiences, organizational roles, relationships, and interdependencies (
15). In recent years, trust has received considerable research attention in order to assure the success of organizations (
16,
17). Tabarsa et al. have shown that organizational justice is one of the factors positively contributing to the employees’ confidence (
18).
Operating room is one of the most complex work environments in health care system, management of which requires state-of-the-art technology as well as specialized knowledge and great competence of the managing and coordinating members. Taking into account the fact that the operating room is a vital part of any hospitals and the staff of operating room wards are always exposed to environmental risk, job burnout, and the like, investigating job-related behaviors of the employees working in the room is of greatest importance. Given the importance of organizational citizenship behaviors in developed and developing countries, as well as the effects of such employees’ behaviors on the performance of organization, it is necessary to determine the relationship between job behaviors and organizational factors and, especially, to investigate the variables such as perception of justice and organizational trust.