Mental disorders are one of the top public health challenges in the WHO European Region, affecting about 25% of the population every year. In all countries, mental health problems are much more prevalent among the people who are most deprived. The WHO European Region therefore faces diverse challenges affecting both the mental well-being of the population and the provision and quality of care for people with mental health problems. The European Mental Health Action Plan focuses on seven interlinked objectives and proposes effective action to strengthen mental health and well-being. Investing in mental health is essential for the sustainability of health and socioeconomic policies in the European Region. The Action Plan corresponds to the four priority areas of the European policy framework for health and wellbeing, Health 2020, and will contribute directly to its implementation.