This study sought to measure the correlation between 'organizational citizenship behavior' (OCB) and 'organizational change adoptability' (OCA).The statistical population included the headquarters of Tejarat, Mellat, Saderat, Eqtesade Novin, Refah Kargaran, Sarmaye and Sina banks, comprising 3980 employees and managers of whom 350 made the ultimate sample. The tests implemented in this study were Pearson's correlation, structural equations model and path analysis. The findings indicated that OCB had a significant positive correlation to OCA. Three aspects of OCB including courtesy, civil behavior and work ethic were also correlated positively to OCA, but two other aspects, namely, friendship type and nobility did not have a significant correlation to OCA.In this research, the relationship between cultural balancing and organizational structure was approved. As a result OCB has a higher effect on OCA in a change facilitating culture and in an organic structure with low formality, complexity and concentration.