Background & Aims : Suicide is the purposeful destruction of human and is a multifaceted problem in requirement man which finds suicide as the best solution to solve the problem. Although the suicide rate in Iran is very low, the reviews show that it is growing. The purpose of this study was to determine the factors affecting successful suicide.

  Methods & Materials : This case-control study was done from 2008-2009. All those who had a successful suicide (Death due to suicide) enrolled to study as case group (n=33) and double size with simple random sampling enrolled as control group (n=66). The data were analyzed by descriptive statistics, chi square tests, and logistics analysis.

  Results : Results showed that male gender is a risk factor for successful suicide. Non-invasive methods for suicide, no previous history of physical-mental illness and residence in city were preventive factors for suicide.

  Conclusion : It seems that the education of households and introduce factors affecting on suicide and death due to suicide especially for youth and adolescents can be an effective way to promotion of mental health and reduction injuries caused by suicide.