2008 IAAF World Indoor Championships – Men's 400 metres
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Medalists
| Gold | ||
 | Tyler Christopher |  Canada |
| Silver | ||
 | Johan Wissman |  Sweden |
| Bronze | ||
 | Chris Brown |  Bahamas |
Heats
| Heat | Lane | Name | Country | Mark | Q | React |
|---|---|---|---|---|---|---|
| 1 | 6 | Sean Wroe |  Australia | 47.23 PB | Q | 0.239 |
| 1 | 5 | Richard Buck |  United Kingdom | 47.54 | Q | |
| 1 | 4 | Greg Nixon |  United States | 47.64 | 0.165 | |
| 1 | 2 | Mark Ujakpor |  Spain | 47.94 | 0.139 | |
| 1 | 3 | Yoann Décimus |  France | DNS | ||
| 2 | 4 | Nery Brenes |  Costa Rica | 46.45 NR | Q | 0.181 |
| 2 | 6 | Chris Lloyd |  Dominica | 46.79 | Q | 0.251 |
| 2 | 3 | Denis Alekseyev |  Russia | 47.07 | q | 0.231 |
| 2 | 5 | Steven Green | United Kingdom | 47.44 | 0.171 | |
| 2 | 2 | Arismendy Peguero |  Dominican Republic | 47.45 | 0.277 | |
| 3 | 6 | Tyler Christopher | Canada | 47.06 | Q | 0.253 |
| 3 | 2 | California Molefe |  Botswana | 47.22 | Q | 0.214 |
| 3 | 5 | Michael Mathieu | Bahamas | 47.34 | 0.167 | |
| 3 | 3 | Clemens Zeller |  Austria | 47.34 | 0.260 | |
| 3 | 4 | Nelton Ndebele |  Zimbabwe | DNS | ||
| 4 | 5 | Maksim Dyldin | Russia | 46.96 | Q | 0.161 |
| 4 | 6 | David Neville | United States | 47.43 | Q | 0.227 |
| 4 | 3 | Edino Steele |  Jamaica | 47.51 | 0.261 | |
| 4 | 4 | Andrés Silva |  Uruguay | 47.54 SB | 0.250 | |
| 4 | 1 | Carlos Santa | Dominican Republic | 48.10 | 0.226 | |
| 4 | 2 | Dalibor Spasovski |  Macedonia | DNF | ||
| 5 | 5 | Johan Wissman | Sweden | 46.12 PB | Q | 0.211 |
| 5 | 6 | Chris Brown | Bahamas | 46.47 | Q | 0.260 |
| 5 | 4 | DeWayne Barrett | Jamaica | 47.02 | q | 0.258 |
| 5 | 1 | Mamoudou Hanne |  Mali | 48.44 | 0.181 | |
| 5 | 3 | Alleyne Francique |  Grenada | 48.64 | 0.248 | |
| 5 | 2 | Takeshi Fujiwara |  El Salvador | 48.82 NR | 0.195 |
Semifinals
| Heat | Lane | Name | Country | Mark | Q | React |
|---|---|---|---|---|---|---|
| 1 | 5 | Tyler Christopher | Canada | 46.57 | Q | 0.253 |
| 1 | 6 | Johan Wissman | Sweden | 46.86 | Q | 0.242 |
| 1 | 3 | Sean Wroe | Australia | 47.13 PB | Q | 0.257 |
| 1 | 2 | Denis Alekseyev | Russia | 47.18 | 0.292 | |
| 1 | 4 | California Molefe | Botswana | 47.74 | 0.342 | |
| 1 | 1 | David Neville | United States | 48.18 | 0.294 | |
| 2 | 4 | Chris Brown | Bahamas | 46.68 | Q | 0.254 |
| 2 | 5 | Nery Brenes | Costa Rica | 46.85 | Q | 0.298 |
| 2 | 6 | Maksim Dyldin | Russia | 46.92 | Q | 0.257 |
| 2 | 3 | Chris Lloyd | Dominica | 46.92 | 0.189 | |
| 2 | 2 | Richard Buck | United Kingdom | 47.60 | 0.232 | |
| 2 | 1 | DeWayne Barrett | Jamaica | 48.41 | 0.242 |
Final
| Heat | Lane | Name | Country | Mark | React |
|---|---|---|---|---|---|
 | 5 | Tyler Christopher | Canada | 45.67 WL | 0.241 |
 | 4 | Johan Wissman | Sweden | 46.04 PB | 0.224 |
 | 6 | Chris Brown | Bahamas | 46.26 SB | 0.263 |
| 4 | 3 | Nery Brenes | Costa Rica | 46.65 | 0.251 |
| 5 | 1 | Maksim Dyldin | Russia | 46.79 | 0.248 |
| 6 | 2 | Sean Wroe | Australia | 46.93 PB | 0.270 |
