Abstract-The Literature highlights the existing challenges in the supply chain management of perishable goods including the reduction of product's value over time. Reduction in quality of products leads decrease in price of products. Consequently, this circumstance results in inefficient supply chain management. One possible solution for this problem is setting a supply change management strategy with proper discount policy in order to increase the total profit. Thus, in this paper, the two-level supply chain of perishable goods, was modeled by taking into account a percent discount. The result reveal that the percentage discount equal to 6% is the optimal value in order to achieve win-win agreement between suppliers and retailers.Keyword-Supply chain, perishable items, Discount policy, Profit I. Introduction and Literature Review Nowadays, the management of the supply chain is one of the most important fields in the business environment. Every supply chain system includes costly factors such as information, product flows, and consumption-saving decision [1], [2]. Thus, proper management of these flows will be a key to success in the supply chain. In other words, the effective management of supply chain should include efficient system design [3], and flow of goods, information and financial resources in order to maximize the profitability of the entire supply chain [4]. In fact, one of the assumptions considered in old inventory models was that all items should maintain the physical characteristics when they are stored in the warehouse [5]. Nonetheless, mass storage of perishable goods in the warehouse, especially, once they begin to lose their quality results in continuous loss or performance deterioration, corrosion damage, waste and penalties for suppliers [6]. By considering these facts, controlling and maintenance of warehouse with perishable goods is a challenging problem for decision-makers. On the other hand, the supply chain of perishable products such as food or pharmaceutical is very important because the diversity of customers in this type of supply chain is more than other systems [7]. For instance, lack of inefficient pharmaceutical supply chain results in remarkable waste of expired medication [8]. Therefore, delivering healthy goods, will increase competitiveness. A summary of conducted studies in recent years in relation to the supply chain management of perishable items is given in Table 1. Identification of characteristics related to destruction and corruptibility emerged as an interesting topic for the scholars since Pahl and his colleagues presented a model of the blood supply chain in warehouse [9]. Since then, researchers have been inspired to create and develop models for warehousing problems of perishable products in different demand levels, not only based on the items' life cycle but also with considering the type of demand which is the driving force of the entire storage system. One of the most comprehensive studies in terms of the production planning of perishable goods was conducted ...