Stéphane Diagana (born 23 July 1969 in Saint-Affrique, Aveyron) is a former French athlete who won the gold medal at the 1997 World Championships in Athletics in Athens over 400 metres hurdles. In 2002 he won the gold medal at the European Championships in Athletics in Munich in the same event. Diagana also set the European record of 47.37 sec. in Lausanne in 1995. He retired from competition in 2004 and became a television commentator and advisor to the French Athletics Federation.
He was a torch runner for the 2008 Beijing Olympics, however Paris city councillor Sylvain Garel tried to snatch the torch from his hands.
He was involved in a serious road accident in January 2011. He was airlifted to hospital after suffering head injuries and although in a serious condition, he did not lose consciousness.
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- 1949: Turkey (unknown)
- 1951: France (Degats, Martin-du-Gard, Clare, El Mabrouk)
- 1955: France (Degats, Martin-du-Gard, Haarhoff, Galland)
- 1959: Greece (Moragiemos, Kormalis, Georgopoulos, Sillis)
- 1963: France (van Praagh, Leriche, Boccardo, Hiblot)
- 1967: Italy (Ottolina, Puosi, Fusi, Bello)
- 1971: Italy (Giovanardi, Puosi, Cellerino, Bello)
- 1975: Yugoslavia (Ivičak, Čikić, Savić, Alebić)
- 1979: France (Dubois, Demarthon, Fellice, Froissart)
- 1983: France (Février, Llatser, Boussemart, Canti)
- 1987: Italy (Pantone, Petrella, Montanari, Ribaud)
- 1991: Italy (Vaccari, Aimar, Nuti, Grossi)
- 1993: France (Rapnouil, Hilaire, Jaffory, Diagana)
- 1997: Algeria (S.-A. Louahla, Talhaoui, Aichaoui, M. Louahla)
- 2001: Greece (Oikonomidis, Lessis, Iakovakis, Dimotsios)
- 2005: Spain (Canal, Testa, Barrios, Reina)
- 2009: Spain (Martín, Ezquerro, Ujakpor, Orozco)