The International Symposium on Fruit Flies of Economic Importance (ISFFEI) is convened once every four years. The previous Symposium (8th) was held in 2010 in Valencia, Spain where Thailand won the bid to be the host for next Symposium. The 9th Symposium is scheduled for 12-16 May 2014 in Bangkok to serve as a forum for scientists and stakeholders across the world to share recent know-how and technologies related to fruit flies control. The Symposium consists of 9 scientific sessions both oral and poster presentation, including a one-day technical tour. There are 388 participants from 60 countries to participate in this Symposium.