Heo Gyun (Korean: 허균, Hanja: 許筠, 1569-1618) was a Korean writer, politician and poet during the Joseon Dynasty. His Chinese name was Danbo (단보, 端甫). Other names were Gyosan (교산, 蛟山), Seongso (성소, 惺所), Baikwolgeosa (백월거사, 白月居士).