The aim of the research was to present changes taking place in retail trade in Poland after economic transformation. The diversity of retail sales forms was presented. Five stages of transformation of this sector were isolated. The directions of changes as well as the perspectives for the development of retail trade were indicated. The period under study was the years 1990-2018. This article was prepared mainly on the basis of literature and data obtained from the GUS (Eng. Central Statistical Office) and studies of the former Instytut Badań Rynku, Konsumpcji i Koniunktur (Eng. Institute for Market Research, Consumption and Business Cycles) in Warsaw. During the period under study, retail trade developed in Poland; both in terms of quantity and quality, in addition to a change in the structure of stores. Ensuing changes positively influenced the development of this sector, which, due to increasing demands of consumers, high competition, changes in legal regulations and technological innovations, will require further transformation. There are plans to create unmanned stores in Poland in the near future, without traditional cash registers, to use secure and fast payments thanks to biometrics and use artificial intelligence to optimise turnover and sales management.