The media fulfill a vital function in the various aspects of human life, which is to inform populations in all areas of life. Regarding this article we raised a question which concerns the relationship between the media and terrorism. It is then a question of the dialectical relationship between terrorism and the media in various aspects, including the functions of the media and their negative effects on the impact of the phenomenon of terrorism. To also demonstrate in this article how the media in their way of functioning manage to give impact to terrorist action. The media play the role of mediator in the interaction between populations and the fomenters of terrorism. The impact of the media on public perception is very important. We demonstrate that media coverage of terrorism has much more impact than the terrorist actions themselves. This impact consists of creating a climate of anxiety and terror within populations. However, in this article we have defined what media are in general, starting from media described as traditional (Radio, television, newspapers, etc.) to those described as modern (internet, social networks, etc.). As for terrorism, despite the global interest in the phenomenon of terrorism, no specific, clear and precise definition of terrorism has yet been agreed upon! Definitions multiply and contradict each other, because of the variety of forms and manifestations of terrorism, the diversity of its methods and patterns, and the profusion of international opinions, political tendencies and beliefs regarding it.