Jiří Mužík (in Czech pronounced as /ˈjɪr̝iː ˈmuʒiːk/) (born 1 September 1976 in Plzeň) is a Czech hurdler.
His personal best time was 48.27 seconds, achieved during the heats of the 1997 World Championships in Athens.
| Representing the | |||||
|---|---|---|---|---|---|
| 1997 | European U23 Championships | Turku, Finland | 4th | 400m hurdles | 50.18 |
| bgcolor=silver | 2nd | 4x400 m relay | 3:04.13 | ||
| Athens, Greece | 8th | 400 m hrd | 49.51 | ||
| Universiade | Catania, Italy | 4th | 400 m hrd | 49.63 | |
| 1998 | Budapest, Hungary | 7th | 400 m hrd[1] | 50.51 | |
| 2000 | Ghent, Belgium | 1st | 4x400 m relay | 3:06.10 | |
| 2001 | Edmonton, Canada | 7th | 400 m hrd | 49.07 | |
| 2002 | Vienna, Austria | 5th | 400 m | 46.36 | |
| Munich, Germany | 2nd | 400 m hrd | 48.43 | ||
| Madrid, Spain | 4th | 400 m hrd | 49.28 | ||