Background and objectives: Suicide is an important problem for social safety and health. This phenomenon is costly for remedy and also is against Islamic values and ethics. Recognizing some risk factors of forecasting after epidemiologic studies on people whom attempted to suicide could prepare and present outlines and proper guides for preventing by health and social planners. This research is purposed on suicide epidemiologic study to obtain full and enough data about deceased people by suicide in Ardebil province.

 Methods: The subjects of this descriptive, analytic and sectional research were 64 deceased people by suicide from 2003-2008, who were registered in Bualy, Fatemu, Alavi Hospital and Forensic Medicine of Ardabil Province. The Data was gathered by a researcher designed questionnaire and analyzed using SPSS software.

 Results: The highest rate of suicide belonged to age rank of 15-24 years (43.8 %), which occurred in female (62.5 %), married people (57.8 %) urban society (65.6 %) and patient without past chronic physical illness or psychiatric history and without pre-attempt suicide. Self poisoning by drugs and toxins were the most common used method in this case (90.6 %). Orderly the most common used drugs were Organo-Phosphorate Toxins, Tricyclic Antidepressants and Aluminum Phosphid.

 Conclusion:�This research is indicating various risk factors such as sex, age, marriage status, residing place of society and easy access to drugs and toxins. According to obtained results, it is better or proper to accomplished related education and training of preventation and interference of mental health in second and third decades of life with allocation of much time for females (especially married). We suggest paying more attention to education, preventation, diagnosis and treatment of poisoning especially poisoning by most common drugs and toxins.