In this paper, we investigate a transaction based partial replication strategy for replicating database in the mobile environments. We propose a heuristic algorithm to select a set of data objects for replicating to and deal-locating from the mobile node, based on the dynamically changing client access patterns. We conduct experiments to compare the performance of our algorithm with that of the full replication and frequency based partial replication algorithms. The results show that the transaction based partial replication algorithm always has a better performance than the full replication strategy. And, in most cases, it is better than frequency-based partial replication algorithms.