The most severe threat against international peace and security is the global terrorism, more specifically the Islamic State as a terrorist organization which has been pointed out as a new form of terrorism due to its unique recruiting and propaganda dissemination using the Internet. The global terrorism as a phenomenon is in need of a global response however the term terrorism lacks a clear definition which makes one wonder how such a response would look like. The aim of this paper is to examine the five permanent member states in the UN security council through a comparative idea analyses to clarify if a consensus exsist on how terrorism is perceive and how terrorism should be fought. Inspired by Andrew Heywood and Gus Martin this paper uses an analyses technique to process the documents from the UN:s database. The conclusion of this paper states that the five member states agree that to counter terrorism they need to work together however disagrees on how the work against terrorism should be fought at a national level.Therefor this paper will argue that the lack of a clear definition on terrorism problematizes the efficiency of the counter-terrorism work.