Summary The series entitled “Mental Health at Work... From Defining to Solving the Problem” is published by the Chair in Occupational Health and Safety Management at Université Laval, Québec, Canada. This series is intended for persons who are involved in occupational health and safety (OHS) and especially mental health at work. From the same series L'ampleur du problème - L'expression du stress au travail Faire cesser le problème - La prévention du stress au travail English version available Scope of the Problem - How Workplace Stress is Shown What Causes the Problem - The Sources of Workplace Stress Solving the Problem - Preventing Stress in the Workplace