Jang Il-Soon (3 September 1928 in Wonju – 22 May 1994) was a South Korean educator and social and environment activist.
His pen names are Chunggang (clean water), Muwydang (wu-wei), and Ilsokja (a hulled millet).
He was a spiritual supporter of poet Kim Chi-Ha, who represented the democratization movement in the 1970s and developed a campaign for life through Hansallim.