This paper proposes an approach for spare part management that involves conflict of interests between units in a company. A case study of spare part problem in a cement industry used, which implicates five working units, called user, spare part planning, maintenance planning, procurement of goods and inventory management. The method used in this research is to classify spare parts into four categories by considering maintenance and logistics perspectives, then using system dynamic model to present the complexity in conflict of interest. This research expected to be useful for companies, particularly in managing conflicts in spare part management.