This article deals with teaching listening in English for Specific Purposes and more specifically in Military English. There are presented different approaches on listening and ways on teaching it in ESP. Active listening it is seen as one of the most productive and applicable approach in teaching ESP students how to master the skill of listening. The student is considered not only a good listener, a good receiver, but a good speaker as well, who gives life to the conversation that is taking place and who is always looking for something more from the cospeaker. There are also considered the listening micro-skills that help the student understand how listening process functions. Besides that, it is treated the importance and the role of listening in Military English. So, the Military English teachers have to teach the students how to listen, to make them comprehend the process, and later test their listening skills. In order to make listening as useful as possible, we first need to know what our students' needs are and in which situation they are going to use listening in the future when they are back to their work. A bibliography is included.