Synchronizing all activities between different tiers of supply chain is an important and influencing function in supply chain management. Information sharing is a critical means in this regard. Information sharing is not just a concept but could be considered as a computable construct which helps to improve supply chain performance. This paper reviews information sharing within supply chain management literature. Based on the reviewed papers, the literature is categorized into four main classes: "information sharing and supply chain performance", "critical parameters in information sharing", "information sharing models" and "information sharing evaluation models". At the conclusion some gaps observed in the literature are discussed and suggestions for future researches are presented.