Ambrose Kiapseni M.S.C., CMG (16 October 1945 – 20 December 2019) was a Papua New Guinean Roman Catholic bishop. Kiapseni was bishop of the Roman Catholic Diocese of Kavieng since his episcopal ordination on 12 May 1991 until his resignation on 22 June 2018. Kiapseni was born in , Lihir Islands, Territory of New Guinea, and was officially ordained a Roman Catholic priest on 7 January 1975. He was a member of the Missionaries of the Sacred Heart religious order. He was appointed to Kavieng by Pope John Paul II on 21 January 1991.