The work environment has been constantly changing since the beginning of time. A lot has happened since the time of the industrialism and the first work environment law came into force in sweden. The focus was first on the physical factors as there was a lot of industry and craft work. This was because there were a lot of industry and craft work. But in connection with the development of society the work environment and it´s rules had to be changed several times in order to be able to maintain a pleasant work environment. But how much focus has actually been placed on the psychosocial factors since the workenvironment law came into force in Sweden? The numbers of the sickleave is at a very high level and are also longer than before. The mental illnes in society continues to increase. What is the employer’s responsibility when it comes to the working environment? Is the regulations clear enough or are they still open for interpretation? Many employers still suffers from ignorance and the workers doesn’t know about their rights. Is there really enough talk about the psychosocial problems today or do they need to be highlighted further? This has become a major social moment at the present time. According to the workenvironment law, the employer must take all necessary measures to prevent bad health at work. But how far does that responsibility actually reach?