Abstract: Range management cooperative as a coherent participatory system in ranges can play a significant role in solving several problems in managing ranges. This people organization is one approaches by which the participation of exploiters can be attracted for effective decisions of prevention of range destruction and continuation of cooperation between local government and exploiters of rangelands. This study aimed to examine the effect of participation of cooperatives’ members in the rate of success of range management cooperatives in Golestan province. This study was done as a survey research. Study population involved ordinary members and board of director of range management cooperatives in which 308 ordinary members and 85 members of board of director were studied by using stratified random sampling. Instrument for data collection was a questionnaire made by researchers and tested by a pilot study. Results of the study showed that participation and cooperation of members in different affairs of cooperative has a strong significant relation with the rate of success of range management cooperatives. Multiple variables regression showed that members’ participation in cooperatives affairs determine 56.3% of changes in success rate of range management cooperatives. Furthermore, results showed that the members of board of directors participated more than ordinary members in affairs of range management cooperatives. Based on the findings it is suggested that some arrangements should be considered so that members participate more in performing renovation and improvement operations and election of board of directors and public associations.