The paper deals with the interpretation of culture, its levels and functions. The discussion focuses on company culture and the premises of the sense of safety. The case study covers the diagnosis of organizational culture in a small service business and is performed with the use of Competing Values Framework formulated by Cameron and Quinn. This method allows for systematizing and interpreting a number of phenomena appearing in an organization and then correlates them with personnel expectations. Results of research with the OCAI method in a company make it possible to make conclusions about the existing state and preferable ways of changes that will be acceptable by the personnel in the aspect of sense of safety.