| Event: | Men's 400 metres hurdles |
| Competition: | 2011 World Championships |
| Venue: | Daegu Stadium |
| Dates: | 29 August (heats) 30 August (semifinals) 1 September (final) |
| Competitors: | 34 |
| Win Value: | 48.26 |
| Gold: | Dai Greene |
| Silver: | Javier Culson |
| Bronze: | L. J. van Zyl |
| Prev: | 2009 |
| Next: | 2013 |
The Men's 400 metres hurdles event at the 2011 World Championships in Athletics was held at the Daegu Stadium on August 29, 30 and September 1.
In the final, Angelo Taylor in lane 1 and L. J. van Zyl in lane 8 bookended the field going out fast into the lead. As they were completing the final turn, Taylor faltered and started hitting hurdles while Javier Culson powered into the lead. Both van Zyl and Culson slowed going into the final hurdle while David Greene cleared the hurdle with full momentum, cruising past the others to take the gold medal.[1] [2]
| width=200 bgcolor=gold | Gold | width=200 bgcolor=silver | Silver | width=200 bgcolor=CC9966 | Bronze |
| Dai Greene | Javier Culson | L. J. van Zyl |
| World record | 46.78 | Barcelona, Spain | 6 August 1992 | ||
| Championship record | 47.18 | Stuttgart, Germany | 19 August 1993 | ||
| World leading | 47.66 | Pretoria, South Africa | 25 February 2011 | ||
| Ostrava, Czech Republic | 31 May 2011 | ||||
| African record | 47.10 | Zürich, Switzerland | 7 August 1991 | ||
| Asian record | 47.53 | Sydney, Australia | 27 September 2000 | ||
| North, Central American and Caribbean record | 46.78 | Barcelona, Spain | 6 August 1992 | ||
| South American record | 47.84 | Helsinki, Finland | 7 August 2005 | ||
| European record | 47.37 | Lausanne, Switzerland | 5 July 1995 | ||
| Oceanian record | 48.28 | Atlanta, Georgia, United States | 31 July 1996 |
| Date | Time | Round | |
|---|---|---|---|
| August 29, 2011 | 11:30 | Heats | |
| August 30, 2011 | 19:30 | Heats | |
| September 1, 2011 | 21:30 | Final |
Qualification: First 4 in each heat (Q) and the next 4 fastest (q) advance to the semifinals.
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 1 | 48.52 | Q | |||
| 1 | 1 | 48.52 | Q | |||
| 3 | 2 | 48.58 | Q | |||
| 4 | 2 | 48.64 | Q, SB | |||
| 5 | 1 | 48.72 | Q, PB | |||
| 6 | 2 | 48.74 | Q, SB | |||
| 7 | 5 | 48.81 | Q | |||
| 8 | 2 | 48.91 | Q | |||
| 9 | 3 | 48.95 | Q | |||
| 10 | 5 | 49.06 | Q | |||
| 11 | 5 | 49.24 | Q, SB | |||
| 12 | 3 | 49.38 | Q | |||
| 13 | 3 | 49.43 | Q, SB | |||
| 14 | 5 | 49.45 | Q | |||
| 15 | 3 | 49.48 | Q | |||
| 16 | 2 | 49.49 | q, SB | |||
| 17 | 3 | 49.51 | q | |||
| 18 | 1 | 49.67 | Q | |||
| 19 | 1 | 49.69 | q | |||
| 20 | 1 | 49.74 | q | |||
| 21 | 4 | 49.82 | Q | |||
| 22 | 2 | 49.82 | ||||
| 23 | 5 | 49.86 | ||||
| 24 | 4 | 49.90 | Q | |||
| 25 | 2 | 49.98 | ||||
| 26 | 4 | 50.29 | Q | |||
| 27 | 4 | 50.39 | Q | |||
| 28 | 3 | 50.44 | ||||
| 29 | 4 | 50.51 | ||||
| 30 | 5 | 50.92 | ||||
| 31 | 5 | 51.02 | ||||
| 32 | 4 | 51.19 | ||||
| 33 | 4 | 51.90 | ||||
| 34 | 3 | 52.98 |
Qualification: First 2 in each heat (Q) and the next 2 fastest (q) advance to the final.
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 1 | 48.52 | Q | |||
| 2 | 2 | 48.62 | Q | |||
| 3 | 3 | 48.80 | Q | |||
| 4 | 1 | 48.83 | Q | |||
| 5 | 1 | 48.86 | q | |||
| 6 | 2 | 49.01 | Q | |||
| 7 | 3 | 49.05 | Q | |||
| 8 | 3 | 49.07 | q, SB | |||
| 9 | 2 | 49.08 | ||||
| 10 | 2 | 49.16 | ||||
| 11 | 3 | 49.29 | ||||
| 12 | 1 | 49.33 | ||||
| 13 | 3 | 49.36 | ||||
| 14 | 3 | 49.57 | ||||
| 15 | 1 | 49.62 | ||||
| 16 | 2 | 49.63 | ||||
| 17 | 3 | 49.71 | ||||
| 18 | 1 | 49.74 | ||||
| 19 | 2 | 49.94 | ||||
| 20 | 1 | 50.05 | ||||
| 21 | 3 | 50.10 | ||||
| 22 | 1 | 50.39 | ||||
| 23 | 2 | 50.89 | ||||
| 24 | 2 | 52.11 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 48.26 | ||||
| 48.44 | ||||
| 48.80 | ||||
| 4 | 48.87 | |||
| 5 | 49.12 | |||
| 6 | 49.24 | |||
| 7 | 49.31 | |||
| 8 | 49.32 | |||