Background: The authors conducted a study of suicide attempts among the patients admitted to the emergency unit of Fukuoka University Hospital, which is located in suburban area in Japan.Objective: To clarify the characteristics of the suicidal patients conveyed to the emergency and critical care centre after their suicidal actions.Methods: Clinical records were used to identify 327 consecutive suicidal patients of from April 2006 to May 2011.We investigated their age, gender, method of suicide attempt, outcome, and psychiatric diagnosis.Results: There were 327 suicidal patients, who had attempted suicide and been transported to this centre, in this period.Of those 327, 95 attempted suicides were completed in care, whist 232 survived at the point of discharge.As to the methods of suicide employed, poisoning (including ingestion of drugs and CO poisoning) is the most prevalent (115 patients), and there were jumping from a high place (49), hanging (27), cutting or piercing instrument (32) in order of number.Psychiatric diagnoses (ICD-10 criteria) of survived patients were 32% of F3, 25% of F4, 18% of F2, and 9% of F6.Conclusion: It is acknowledged that there is an under-reporting of suicide to a varying degree in different groups.Actually, much more behaviours happen than the number of suicides which are made public.The subjects of this study were generally severe suicidal patients, and survivors provided important information on suicidal behaviours.We found various psychiatric diagnoses among suicide attempters.That means we need to deal with not only mood disorders but other mental disorders for suicide prevention.