This study was undertaken to investigate the role of agricultural extension in maximizing export marketing abilities of owners of processing and backing stations of vegetables crops in Kafr-Eldawar district, Elbehira Governorate. Nine sub-objectives were included. A well prepared and pretested  questionnaire was used to collect data needed for this research. Data were gathered from a sample consisting of 85 owners of processing and packing stations of vegetables crops. The data were analyzed statistically by using a computer through the use of SPSS program, percentage, average, Pearson's correlation coefficient and partial and multiple- regression were used in the data analysis. The main results of this study were as follows: The averages of the most independent variables were low, with high variance between the total degrees respondents, as it turns out decrease of average of Agricultural extension role in maximizing marketing export capabilities, at the same time increase variance between the respondents. While at the same time showing decrease of total degrees for maximizing marketing export capabilities to respondents, and the same time, high variance between them. With regard to multiple correlation and regression analysis, it was clear from the regression model that four independent variable were responsible for the interpretation of 4.47% of the total incident variance in total degrees for maximizing market export capabilities on dependent variable at the potential level 0.01, and with respect to the multiple regression analysis between the agricultural extension role as intervening variable and the dependent variable was showing that the intervening variable responsible for the interpretation of 11.2% of the total variance could happen in the total degrees of the dependent variable at the potential level 0.01.