Park Jieun majored in Child Development and Education at university and studied illustration at graduate schools in Korea and the United Kingdom. Books illustrated by Park Jieun include A Collection of Poems for Children with Sound, The Three Bales of Straw Rope, Grandpa Is an Eight-Year-Old Baby, The Stone Became Warm, What If I Made the Laws? and The World’s 100 Fables Funnier Than Aesop's.