Over the last years, there has been observed acceleration of development of the discounts stores in the Polish market. A stimulating impact on this is exerted by a low level and low dynamics of consumer demand, its weak diversification, growing customers' preferences as regards cheap sources of procurement, an effective organisation utilising the synergy effect in discount trade. In his article, the author presents the premises for development of the networks of discount stores in the grocery, clothing and footwear segments in the period of economic transformation in Poland. Next, the organisation and strategies of marketing activities aimed at a permanent growth of these networks are shown in a certain light.