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The purpose of this study was to conduct a descriptive survey to study the attitudes and perceptions of Iranian agricultural extension professionals on the concepts and thoughts of sustainable agriculture. The dimensions were production efficiency, economic viability, social responsibility and environmental sustainability. The target population of this study consisted of faculty members of universities in agricultural extension education, extension chairmen in provinces and extension specialists of deputy of agricultural extension and farming system in the Ministry of Agriculture in Iran. A sample consisting of 87 respondents was selected through random sampling. The instrument used for assessing the attitude of respondents on the concepts of sustainable agriculture was a questionnaire by reliability 0.72. Replies of respondents indicated that the attitude and perceptions of Iranian agricultural extension professionals on the concepts of sustainable agriculture were moderate (M= 78.18, SD= 7.23). The social responsibility dimension by mean 4 (SD= 0.52) and the economic viability by mean 2.91 (SD= 0.56) showed the best and poorest attitude of respondents, respectively on the concepts of sustainable agriculture. Responses were grouped based on the differences in standard deviation of mean, which revealed that 73.4% of respondents had moderate attitude towards concepts of sustainable agriculture. The results of Kruskal Wallis test revealed no significant differences in the perceptions of respondents in terms of their age, level of education, years of experiences and organizational post.