As many buying decision are made in retail stores, it is interesting to investigate which factors, such as noise, lighting, music, colour, layout or visual communication have a significant influence on customers’ behaviour in a supermarket. Since only a few studies have been conducted among customers in Sweden, this paper examined their behaviour in the supermarket. The purpose of this study was to examine the role of the various environmental factors in the supermarket as well as how the perceived servicescape influences customers’ behaviour in the store. The research approach used was that of a single case study, based on survey instrument (personal interviews and electronic collection) in order to collect data on facets in regards to the perceived servicescape and customers’ behaviour in the supermarket. A supermarket chain – the ICA group, precisely ICA MAXI in Jönköping was used for this purpose. The collected data was analysed with the means of factor analysis and multiple regression methods in order to obtain factors that can influence customers’ behaviour in the supermarket. The conducted study showed that lighting, noise, colours, signs and symbols as well as space/function conditions such as layout and equipment are the factors that create emotionally pleasant environment in the supermarket. Thus, these factors influence customers’ moods, attitudes or certain beliefs about the supermarket. Moreover, customers may feel happier, more satisfied or relaxed in the supermarket, which lead to arousal – stimulation or excitement. Furthermore, the environmental factors explain the approach behaviour such as exploring the supermarket, spending more time on browsing the products which, consequently, refer to an increased number of items bought.