Conrad Alcon Jantjes (born 24 March 1980 in Boksburg, Gauteng) is a South African rugby union footballer who used to play primarily as a fullback for the Springboks in international rugby and the Stormers in Super Rugby. In the domestic Currie Cup he spent six seasons with the Golden Lions before switching to his current team, Western Province. Former Springbok coach Harry Viljoen handed Jantjes his debut against Italy in 2001, but he fell out of favour before forcing his way back into contention during Jake White's reign as the team's coach.