The Korean Journal of Pediatrics (Korean J Pediatr) is the official publication of The Korean Pediatric Society (KPS) which was established in 1945. The Korean J Pediatr is a peer-reviewed monthly journal of medicine. The first issue was published in 1958 as the Journal of the Korean Pediatric Society, with a Korean title of 'So A Kwa'. The title of the journal was revised to 'Korean Journal of Pediatrics' in 2004. The KPS will publish the Korean J Pediatr as an open, free access English journal starting with Issue 5, Volume 53, 2010 to facilitate its international competitiveness. The KPS believes that this change will be a big step toward the globalization of the KJP and provide the opportunity to communicate with pediatricians throughout the world. Articles published in the journal can be obtained for free from the official web-site of the Korean J Pediatr (www.kjp.or.kr) in English as contents, abstracts, and full text PDF files. English abstracts can also be viewed on the web-site of the KoreaMed and KoreaMed synapse search system (http://www.koreamed.org). The Korean J Pediatr will continue to work to accomplish its goal of being one of the key international journals of the pediatrics field. The Korean J Pediatr welcomes good articles on pediatric medicine from sources all over the world.