Safety culture can be seen from many aspects. Some people in their definitions place emphasis on observable indicators of safety culture, while others concentrate more on the identification of basic principles of safety culture, which affect the „safe behaviour” of organisation members. Safety culture seen as a part of organisation’s culture is reflected in rules, values, attitudes and behaviour of its employees. One of the areas of the improvement of working environment is the optimisation of workstations in line with ergonomics principles. The areas of the improvement of ergonomic working conditions include: the amount of energy expenditure, static load connected with the work performed, the repeatability of working movements, the type and availability of personal protective equipment. The paper has presented a part of the work safety audit carried out in June 2016 in a mining-related heavy industry company from Silesian voivodeship. The results of the presented survey show that creating appropriate working environment affects occupational health and safety not only in the area of optimisation of protection against hazards, but also building desired employee’s behaviour.