Internet addiction disorder (IAD) is defined as one’s inability to control his internet using, which could lead to physical, psychological, and social difficulties (
1). Internet use is recognized as an essential part of the modern life. Owing to web-based technologies and increased internet access in Latin America and Asia, use of internet has dramatically increased across the world, with the global number of internet users reaching more than 2.3 billion in 2011 (
2). Internet provides many positive benefits to users as it allows them to obtain new information, knowledge, and even entertainment. However, it also causes many problems. Its explosive growth in the last decade had a huge impact on communication and interpersonal behavior. Internet was originally designed to facilitate communication and research activities, but the dramatic increase in its use in recent years has led to pathological use (
3,
4). Today, internet addiction is discussed as a psychological disorder in psychology and medical sciences. Clinical specialists have reported cases of this disorder observed in their clinics. As a new form of addiction in recent years, it has attracted the attention of researchers in psychology, psychiatry, sociology, and other scientific fields (
5). In his research, Yang found that internet addiction has seven main reasons: insecurity, financial problems, marital discontent, work stress, anxiety, family disputes, and limited social life (
6). Griffiths defined internet addiction as a non-chemical addiction originating from interactions between human and machines and added that technological addiction is either passive (television) or active (computer games), prompting and reinforcing the characteristics facilitating addictive tendencies (
4). Internet addiction is accompanied by several psychological problems, including self-doubt, anxiety, and depression (
7). Perceived social support is defined as a mental sense of belonging, acceptance, and being loved by others; thus, it can foster secure relationships for a person. Theorists believe that perceived social support, as a comparative source, can decrease the harmful effects of stressful factors in one’s environment (
8). It is believed that the social support of friends, family, and others decreases psychological stress in people. Shaikhalizade et al. (
9), Cohen and Sayme (1985), Vex (1998), and Sarasoon (1990) referred to the major point that decreasing social support increases the vulnerability of physical and mental structures. Concurrent with many studies worldwide, a few researches are conducted in Iran (
10). It was found that because of internet addiction, students had weaker social relations and weaker mental health; they preferred using internet to having social relationship with their friends, family, spouse and other people.