The research aimed at identifying the knowledge level of potato small-scale farmers about the export terms of condition to the EU countries, and determining the social and environmental impact on them after applying the agriculture aspect of the EGY-EURO partnership treaty regarding exporting potato to EU countries, in addition to identifying the problems facing them after application of the treaty, and finally identifying farmers suggestions to overcome these problems. The research took place in Behira governorate as it represents one of the pest free areas from potato disease particularly brown rot and Menofia governorate as it represents one of the infected areas with brown rot disease. A random sample of about 100 small-scale farmers from Elisha'a village, Abo-Al Matameer district (Markaz), Behira governorate and same sample size from Al-Baraniah village, Ashmoun district (Marakaz), Menofia governorate. Data were collected during October and November 2012 by personal interview questionnaire that fulfills the research's objectives and the following statistical methods were used: frequencies, percentages, arithmetic mean, and standard deviation to describe the studied social and environmental impact indicators and define the differences between both studied areas. The following represent the most important research results: The results revealed variance in knowledge level of interviewees regarding potato export terms of conditions to EU countries and also between the two studied areas in favor of the area allowed to export (Behira).The social and environmental impact on farmers increased positively after the application of the treaty in its agriculture aspect in favor of the area allowed to export (Behira) and also it varied among the two areas. The results showed that the most important problems that affected the farmers after the treaty application in the areas allowed to export (Behira) were: low export prices, limited marketing opportunities locally, and lack of credibility of companies in seed contracting, whereas in areas not allowed to export (Menofia) were: lack of marketing outlets locally, low prices and deteriorated agriculture drainage network.