(Title in Polish - 'Ocena funkcjonowania i skutków wdrazania programów wsparcia inwestycji w gospodarstwach rolnych z wykorzystaniem funduszy UE'). The article contains the main conclusions resulting from the evaluation of the impact of the investments co-financed from the EU structural funds in 2004-2008 on the development of farms. The analysis was made on the basis of a random sample of 30 farms which were granted the aid for investments under the Sectoral Operational Programme 'Agriculture...' and the'SAPARD' Programme. The farms were divided into four categories according to the value of investment outlays in relation to the value of fixed assets. The analysis was made in respect of the main production lines, the resources of land, labour, capital, the level of income derived form a family farm as well as the productivity of the factors of production.