Suicide is a real public health problem, by the loss of life it provoked and by the psychological and social problems as reflected in it. It is always a painful event, which returns to the guilt of loved ones and the responsibility of those present. In prison, the number of suicides increased significantly for several years. The Prison Administration and the Ministries of Health and Justice are dealing with the problem. Two reports were published in 2004 and 2009. Their mission was to assess and propose a program for the prevention of suicide of persons detained. These two reports conclude with a series of recommendations. One of the principal axes is the specific training of all staff involved in the prison environment. In June 2012, we conducted an investigation in order to evaluate the specific training of personnel involved in prison suicide prevention. It is a questionnaire of self-evaluation, distributed to all the staff of the house arrest of Grenoble - Varces. The results confirm the hypothesis of the lack of specific training of persons working in prison. Indeed, less than half of the staff received this training. In addition, some people received this training over ten years ago, and would need a reminder. In total, half of the staff feels a need for further training, and feels not well trained as an actor in the prevention of suicide. However, the answers concerning the epidemiological data are reassuring. Suicide risk factors and periods most at risk are identified by stakeholders. Similarly, the means of suicide the most used are known. Finally, eight years after the first report, we found that the targets pre-defined in terms of training of stakeholders are not achieved.