| Hernán Buján | |
| Fullname: | Hernán Leonel Buján |
| Birth Date: | 5 December 1974 |
| Birth Place: | Argentina |
| Position: | Midfielder |
| Years1: | 1995 |
| Clubs1: | River |
| Caps1: | 1 |
| Goals1: | 0 |
| Years2: | 1995–1997 |
| Clubs2: | All Boys |
| Years3: | 1997–1998 |
| Clubs3: | Los Andes |
| Caps3: | 34 |
| Goals3: | 2 |
| Years4: | 1999–2000 |
| Clubs4: | Instituto |
| Years5: | 2000–2001 |
| Clubs5: | Talleres |
| Caps5: | 20 |
| Goals5: | 1 |
| Years6: | 2001–2002 |
| Clubs6: | Huracán |
| Caps6: | 35 |
| Goals6: | 1 |
| Years7: | 2002 |
| Clubs7: | Atlético Morelia |
| Years8: | 2003 |
| Clubs8: | León |
| Years9: | 2003–2005 |
| Clubs9: | Olimpo |
| Caps9: | 55 |
| Goals9: | 1 |
| Years10: | 2005–2006 |
| Clubs10: | Tiro Federal |
| Caps10: | 27 |
| Goals10: | 0 |
| Years11: | 2006–2007 |
| Clubs11: | Godoy Cruz |
| Caps11: | 27 |
| Goals11: | 2 |
| Years12: | 2007–2008 |
| Clubs12: | Instituto |
| Years13: | 2008–2009 |
| Clubs13: | Independiente Rivadavia |
| Caps13: | 31 |
| Goals13: | 2 |
| Years14: | 2009 |
| Clubs14: | All Boys |
| Years15: | 2010 |
| Clubs15: | Unión |
| Caps15: | 11 |
| Goals15: | 0 |
| Years16: | 2010 |
| Clubs16: | Lemos |
Hernán Leonel Buján (born 5 December 1974) is an Argentine former footballer who played as a midfielder currently first-team coach of Al-Ittihad.
In 1999, he signed for Argentine side Instituto. He helped the club achieve promotion.[1] In 2003, he signed for Argentine side Olimpo. He was nicknamed "spark plug" while playing for the club.[2]
He was born in 1974 in Argentina. He has been close friends with Argentine football manager Marcelo Gallardo.[3]