of death instinct, which is in opposition to libido. Erwin Stengel is the first person to differentiate between suicide and suicide intention from a psychological point of view. After some research, he dedicated an independent branch of psychology to the suicide intention. Research has suggested that unlike suicide the intention of suicide has other goals than just simple "self destruction". Kayral has mentioned the following four goals of suicide intention: 1- an invitation or asking for help and support; 2- a reaction to a disaster or an unexpected catastrophe; 3- abusing or threatening of others; and 4- an escape from a harsh situation. According to Eslaminasab, the following five behaviors of suicide ideation, threatening to commit suicide, suicide gesture (harming oneself), suicide attempt, and death by suicide, are categorized under suicidal behavior. The term "suicidology" became prevalent in the 1960s. It was first used in 1929 by the Dutch scientist, W. A. Bonger. Suicidology is the scientific study of suicide and its different aspects. Statistics Suicide in Iran is believed to be a growing concern over recent years. According to World Health Organization in 2014 the suicide rate of Iran was 5.3 in every 100,000 people. In that year, the rate of suicide based on gender was 3.6 for women and 7 for men. Seasonally, most suicides occurred in summer with the rate of 35.2% of all suicides; 13% higher than any other season. Based on a meta-analytical research, in Iran, the rate of non-fatal and fatal suicide attempts among married couples is higher than other groups. The statistics provided by the Medical Jurisprudence Organization of Iran show that 54% of suicides ending in death occurred among people under 30 years of age and that people who lived in the cities had statistically higher rates of suicides than people living in rural areas. Reasons According to the field research questionnaires given to the suicidal patients referred to Loghman Hospital from 1970 to 1972, family-related issues, with a prevalence of 56%, were the most important reasons of committing suicide. (Table 1). In this study, family-related issues consisted of conflicts between married couples and their parents, and also improper interpersonal relations between parents and their children or other siblings with each other. Such issues started from the ages of 15 to 19 and were most frequent among 20- to 24-year-olds. These two age periods combined were the cause of 56% of total