In recent studies, there has been much interest in the relationship between customer partnership and its effect on CRM success. Yet, there is little empirical work on it. This study empirically examines the relationship between customer partnership and CRM success in Korean companies. The findings indicate that the success of the relational systems(information technology and education/reward) is significantly related to trust to customer and customer partnership. The study also provides empirical evidence that trust and customer partnership is positively related to the new CRM success and the traditional CRM success.