The purpose of the study was to examine managers´ knowledge, experience and perceptions of a municipality's security-promotion work and its significance for the overall experience security in the municipality.   Insecurity among residents is a major challenge for a municipality. It can lead to impaired public health, which long term affects many individuals. Insecurity and security are often linked to a socially sustainable society and should equal for all. Therefore, it is of great importance for the development of society that basic needs such as security are part of the security promotion work that is carried out.   The study used a qualitative method with four semi-structured interviews. The data was transcribed and analyzed by a thematic analysis method.   Results showed that the managers expressed a unified view that the perceived insecurity was perceived as vague and without foundation as the statistics show no increase in crime. Based on different social groups, insecurity is perceived and perceived differently. The municipality of Söderhamn has put security-promoting work high on the agenda, in order to increase the safety of the people in the municipality. By having a common sense and a greater understanding of the words used, conditions are created to reduce misunderstanding and ambiguity.   However, it is important to prioritize security-promoting work for the sustainable development of municipalities and it needs clarity in collaboration between administrations. It is also of the utmost importance that all administrations work together based on what is prioritized.   Keywords: safety-promoting work, insecurity, security and experienced feelings.