Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 48 8 2019 07 18 1512 1517 Yousef VEISANI Psychosocial Injuries Research Center, Ilam University of Medical Sciences, Ilam, Iran Ali DELPISHEH Department of Clinical Epidemiology, School of Public Health, Ilam University of Medical Sciences, Ilam, Iran Reza VALIZADEH Department of Psychology, Psychosocial Injuries Research Center, Ilam University of Medical Sciences, Ilam, Iran Sattar KIKHAVANI Department of Psychology, Psychosocial Injuries Research Center, Ilam University of Medical Sciences, Ilam, Iran 2019 07 18 Background: Research in source of inequality and enhance of knowledge can be reducing the inequalities in the coming decades. Therefore, we aimed to ascertain effects of income inequality measured by Gini-coefficient to death from suicide in Iran. Methods: This is an ecological study on the relation of Gini-coefficient and suicide death in Iran. Data were obtained from Iranian Urban and Rural Household Income for Gini-coefficient and Expenditure Survey and Iranian Forensic Medicine Organization for suicide. Concentration Index was used to determine of inequality by Gini-coefficient in suicide death and prediction model was applied by Stata software. Significant level considered less than 5%. Results: A Gini-coefficient between 0.2523 and 0.3755 (mean, 0.3092) was observed. The overall concentration index CI was -0.10 (95% CI= -0.19 to -0.01), therefore our results confirmed a positive inequality in incidence suicide rate result from income inequality in Iran. Conclusion: Our results showed a positive inequality due to Gini-coefficients in suicide death. This study could be a start for investigation of inequality source in geographical units and at the individual level in all provinces.       https://ijph.tums.ac.ir/index.php/ijph/article/view/17823 https://ijph.tums.ac.ir/index.php/ijph/article/download/17823/6478