The problem that plastic bags cause to the environment is one of the most significant environmental problems. Not much attention is paid to this problem on the territory of the Republic of Serbia, and there is a gap where scientific research is concerned. In addition to mitigating this gap, the aim of this paper is to identify the basic factors which reduce the consumption of light (disposable) plastic bags using exploratory factor analysis. The results of the conducted analysis show that the development of environmental awareness, the availability of alternatives, social norms, and economic instruments that could be implemented in the future have a positive impact on the change in consumer behaviour on the territory of the Republic of Serbia when it comes to the use of plastic bags.