Competition policy has become an important issue for the member states of the ASEAN region as a result of their efforts to integrate their national markets into the ASEAN Economic Community. Competition policy has thus become a closely intertwined part of the economic regionalisation which these countries are seeking to achieve. This chapter traces the evolution of regional Competition policy in the ASEAN region, examining the ASEAN Economic Blueprint(s) and Regional Guidelines that provide the member states with strategic goals to implement. The developmental trajectory of Competition policy in ASEAN is analysed and the challenges that lie ahead, if harmonisation between their national competition law regimes is to be achieved, are critically discussed in this chapter. The major regional documents and institutional actors responsible for driving ASEAN's regional Competition policy are also introduced in this chapter, along with concise summaries of the myriad of related issues which are addressed in the other chapters of this book.