In general it can be stated that it is beneficial for your health to be employed. There is strong evidence that work itself, despite its risks, reduces the risk of depression and improves mental health(Waddell & Burton, 2006; van der Noordt, IJzelenberg, Droomers, & Proper, 2014).Mental health, like mental illness, is avaguely defined concept.Mental healthis a non-contextual concept which canbedefined asthe absence ofmental illness, and with the opportunity to developand flourish with high levels ofemotional,psychological and socialwell-being(Keyes, 2005).The concept ofwellbeingat workis inclusive.Itrelates tothe physical environment,work-relatedrisks, organization of work andtasks, relationships with colleagues,personalhealth and work ability and evenfamily-relatedstress(Suomaa, Yrjänheikki, Savolainen, & Jokiluoma, 2011). It canalso be seenas an importantdeterminantofproductivityat the individual, corporate and community levels(Schulte & Vainio, 2010).

"Healthy factors" for mental health in the workplace are factors and circumstances at work that may have a preventive and/or promotional effect on mental health and wellbeing of the workers. These factors can be reversed risk factors and serve as a resource (buffer) against negative consequences of various risks at work. They may also be factors that, by themselves, create positive health benefits for the individual and the workplace. The large numbers of work-related mental unhealthy call for action in improving working conditions, but which are the important determinants of positive mental health and wellbeing at work to be influenced? A review of indicators for healthy workplaces has recently been performed (Lindberg & Vingård, 2012), but we have not found any comprehensive review concerning mental health at work. Hence, the aim of this study was to review current knowledge concerning determinants for mental health and wellbeing at work.