On behalf of the Korean Society of Toxicology (KSOT), we have the great pleasure of inviting you to the International Congress of Toxicology 2013 (ICT 2013) to be held at the COEX convention center in Seoul, Korea, June 30 ~ July 4, 2013, the Thirteenth World Congress of IUTOX. This congress will offer you many opportunities to exchange advanced knowledge on Toxicology. This year’s congress will be comprised of keynote lectures given by world-renowned scholars, in addition to symposiums, workshops, debates, as well as oral and poster sessions. The organizing committee is also planning a variety of unique and colorful social programs so all of our participants will be able to enjoy our fascinating Korean culture and warm spirit of friendship. Seoul, a city with a harmonious mixture of old and new, has been the capital of Korea for over 600 years. As Korea’s political, economic, social and cultural center, it has won world recognition by successfully holding a multitude of world-class events, such as the Seoul 1988 Olympic Games, 2010 G20 summit, Asia-Pacific Economic Cooperation ( APEC) and The Asia–Europe Meeting (ASEM), to name a few. We truly hope that you will take this chance to join us here at this grand event in Seoul and lavish in the wonders of the traditional culture and customs of this hidden jewel in Asia. We look forward to welcoming you and your active participation in the ICT2013, Seoul, South Korea.