The aim of this study was to investigate the role of livestock cooperatives in improving economic status of animal holders in Hamedan province. The study has used a surveying methodology. For gathering data a structured questionnaire was used and its reliability was calculated by Cronbach's Alpha test and it was (α=0.80). The research samples consisted of 300 animal holders (beef cattle breeders) included 150 members of livestock cooperatives and 150 non-members. In order to data analysis both correlation coefficients and t test were used. Results showed that there was a negative relationship between the age and membership in the livestock co-ops, there was also a positive relationship between education level and membership. Results revealed a difference between two groups of animal holders in terms of red meat production. This shows that members of livestock co-ops had a higher meat production in comparison with the non-members. In addition, the members of livestock co-ops participated in more training courses and they had a higher mean on technical knowledge than non-members. [Samira Jeyhooni et al. The Role of Livestock Cooperatives in Improving Economic Status of Animal Raisers: A Case Study on Cattle Breeders, Hamedan, Iran. International Journal of Agricultural Science, Research and Technology, 2011; 1(4):165-169].