Arnaud Malherbe (born 20 November 1972) is a South African sprinter who specialized in the 400 metres.
His personal best time is 44.59 seconds, achieved in March 1999 in Roodepoort. At the time, it was a South African Record. He has the distinction of being the first South African to break 45 seconds in the 400m and was national champion four consecutive times between 1996 and 1999.
Together with Jopie van Oudtshoorn, Hendrik Mokganyetsi and Adriaan Botha he also held the South African record in the 4 x 400 metres relay with 3:00.20 minutes, achieved at the 1999 World Championships in Seville. In those World Championships, he ran the fastest split ever recorded by a South African man, with 43.78s, helping his team win the bronze medal. In 1998, in the World Cup in Johannesburg, he was a member of the African 4x400m Relay Team who eventually received the Bronze medal, after disqualification of the USA team, due to doping violations.