The main purpose of the present study is to evaluate the degree of visitors’ satisfaction from the Red Crescent drugstores and the identification of the effective factors affecting that satisfaction. Statistical society of this study includes all visitors to Tehran’ s Red Crescent drugstores. According to Morgan Table, 384 individuals were chosen as samples. In this study, the degree of visitors’ satisfaction from the Red Crescent drugstores has been evaluated by means of circular scale. In order to identify the effective factors affecting visitors’ satisfaction, a self-made questionnaire was applied. Analyzing data, descriptive and inferential methods were applied which include: median, standard deviation, T-Test, regression, independent T-Test, one-way variance analysis. The results show the visitors’ satisfaction from the Red Crescent drugstores. And this satisfaction was almost good over the issues of physical factors, trust, sympathy, and responsiveness. But in assurance factor, the degree of satisfaction is almost average. Regarding statistics, the results of T-Test also show a significant degree of satisfaction. Results of multiple linear regressions also show that, employees’ interaction and behavior, general quality of pharmaceutical services, and human reliability are main effective factors on Tehran’ s Red Crescent drugstores visitors’ satisfaction. But drugstores’ physical environment itself does not have any significant impact on visitors’ satisfaction. Also, the degree of satisfaction is more among men than women. And finally, the age and education do not have any significant impact on the degree of visitors’ satisfaction from drugstores.