The advancement of information technology is changing the pattern of radical group propaganda from conventional methods to the ways they use today, namely using the media and cyberspace, or what is also called   as   cyber  -  terrorism. The purpose of this study is to discuss the emergenc  e   of the   currently experienced   cyber  -  terrorism   phenomenon  .   It     is   normative research through   a literature study   method   by approaching statutes  . The results of this study indicate that cyber  -  terrorism is   a part of   cybercrime that   is   qualified as transnational crime   which   refers to Article 3   of the   United Nations Convention   a  gainst Transnational Organized Crime. Currently  ,    there are several laws/regulations regarding terrorism at the national, regional and international levels. However, these rules do not specifically regulate new developments in acts of terrorism through cyberspace or what is known as cyber  -  terrorism.       Keywords:  Cyberspace, Terrorism, Transnational Crime.