In recent years, research on wireless sensor networks has increased significantly because it offers the advantage of monitoring a wide variety of environments to detect physical phenomena. Wireless sensor networks consist of many sensor nodes where each sensor node has ability to send, receive and detect phonemena. On the other hand, sensor nodes have limited capabilities such as memory capacity, bandwidth and energy consumption. In this research, we focus on energy consumption in supporting clustering protocol and evaluate it in mobile networks. We use the reference of protocol i.e. LEACH to evaluate our protocol i.e. MN-LEACH. The proposed protocol add feature of LEACH to support mobile nodes as well as to get energy efficiency in each round of the network resource. The performance of MN-LEACH outperforms LEACH because it supports hand-off mechanism