This study was conducted to investigate effective factors on the tendency of walnut producers towards participating in establishing walnut production cooperatives in Tuyserkan county of Iran. It was a descriptive-correlation research using both descriptive statistics (frequencies, percentage, mean, minimum and maximum) and analytical statistics (correlation and regression analysis, Mann-Whitney test). Calculating correlations between variables showed positive and statistically significant relations between 'tendency to participation' and performance, off-farm income, on-farm income, capital supports of government, social preconditions and producers’ attitude; in addition, there were found negative and statistically significant relations between 'tendency to participation' and work experience and the age, as well. Stepwise regression analysis indicated that walnut producers’ attitude, off-farm income, capital supports of government, work experience and social preconditions explained a statistically significant portion of variance (R2= 42) for the producers’ tendency to participation. Regarding the standardized coefficients, producers’ attitude was considered as the most effective factor in predicting variance of the dependent variable.