This article presents problems in agrarian transformations, especially related to the number and area structure of farms in Poland before accession into the European Union. It presents consecutive stages of agrarian transformations in the territory of Poland, starting from the period of partitions at the beginning of 20th century, till economic transformation and integration of Poland into the European Union. In historical perspective, it may be stated that there is a close relationship between agrarian transformations, and the level of economic development and socio-political system in our country. These relations are bilateral in nature, i.e. they are interdependent. Agrarian transformations observed after 2004 are evident, however, they did not bring Poland any closer to the level of leading EU Member States.