Johannes Hendrik Conradie (born 15 June 1938) is a South African retired judge who served in the Supreme Court of Appeal from 2002 to 2007. He joined the bench in 1987 as a judge of the Supreme Court's Cape Division, later the Cape High Court. Before that, he was a practising silk in Johannesburg.

Conradie was born on 15 June 1938 in Johannesburg.^[1] He attended Laerskool Jan Celliers and Helpmekaar High School, matriculating in 1956.^[1] After one year of undergraduate study in Switzerland at the University of Basel, he enrolled at the University of the Witwatersrand, where he completed a BA in 1959 and an LLB cum laude in 1963.^[1]

Conradie was admitted as an advocate in 1964 and practised law at the Johannesburg Bar for the next 23 years, taking silk in 1982.^[1] He was an acting judge in the Supreme Court of South Africa in 1984 and 1985.^[1]

In 1987, he was permanently appointed to the bench as a judge of the Supreme Court's Cape Division.^[1] He served in that court (which later became a division of the High Court of South Africa) until 1 June 2002, when he was elevated to the Supreme Court of Appeal;^[1] he was appointed to the appellate court by President Thabo Mbeki on the advice of the Judicial Service Commission.^[2] He retired in 2007.