Gong Chan Sik (Hangul: 공찬식; hanja: 孔燦植; born August 14, 1993), better known by his stage name Gongchan, is a South Korean idol and the youngest of boy band B1A4. He made a debut on the stage of MBC Show! Music Core on April 23, 2011. He has been part of five Korean mini albums, two Korean studio albums, and two Japanese studio albums.