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In Mobile Adhoc Networks (MANETs), due to frequent network partition, data availability is lower than that in traditional wired networks. Cooperative caching provides an attractive solution for this problem. In this paper we propose a new proactive approach for cooperative caching in MANETs, in which we will cache the data of leaving node. Here each mobile node will broadcast a “LEAVE” message when it moves out from its zone. Based upon its Caching Information Table (CIT) zone manager will decide which data is to be cached. This will help to improve the data availability and overall performance of the network.