This guideline contains the recommended immunization schedule for children and adolescents in Korea by the Committee on Infectious Diseases of the Korean Pediatric Society, updated in March 2013. It also includes a catch-up immunization schedule for children and adolescents who are behind the recommended schedule. These schedules are a minor revision of the corresponding parts of immunization guideline, 7th edition, of the Korean Pediatric Society, released in 2012. Tables of this paper are published with quotation approval of immunization schedule English version of Committee on Infectious Diseases and Committee on Publication of the Korean Pediatric Society.