Abstract Wireless Sensor Networks (WSNs) consist of sensor nodes deployed in a manner to collect information about surrounding environment. Wireless Sensor Network (WSN) is implemented in open medium environment and the sensors nodes are fully distributed in nature. Moreover, WSNs have limitations in terms of energy, bandwidth, computations and memory. Their limited computational ability and battery resources restrictions make them vulnerable to many kinds of attacks. Intrusion Detection Systems (IDSs) can play an important role in detecting and preventing security attacks. The aim of this paper is to provide a detailed review about current IDS and its architectures for WSN. Finally we focus on comparison of recent Intrusion Detection architectures in WSNs.