Ergonomics is an important area for occupational health. Cleaning is semi-hard physical work that an employee should be able to do from entering the full-time labour market until retirement. Occupational health is very important for this. There are various hazards in the work environment of cleaning service workers: chemical, biological, physical, mental. In the case of occupational diseases, the effects are usually noticeable years later, and it may be difficult to establish links between working conditions and the effects, but they do exist.