2001 IAAF World Indoor Championships – Men's 400 metres
The men's 400 metres event at the 2001 IAAF World Indoor Championships was held on March 9–11.Medalists
Results
Heats
The first two of each heat and the next 2 fastest qualified for the semifinals.
Rank | Heat | Name | Nationality | Time | Notes |
| 2 | Daniel Caines | | 46.65 | Q |
| 1 | Mark Hylton | | 46.79 | Q |
| 1 | Jimisola Laursen | | 46.82 | Q, SB |
| 2 | David Canal | | 46.85 | Q |
| 3 | Danny McFarlane | | 46.90 | Q, PB |
| 1 | Boris Gorban | | 46.91 | q |
| 2 | Sunday Bada | | 46.91 | q |
| 4 | Sofiane Labidi | | 46.93 | Q, NR |
| 4 | James Davis | | 47.01 | Q |
10 | 4 | Andrey Semyonov | | 47.01 | |
11 | 3 | Félix Sánchez | | 47.02 | Q |
12 | 5 | Milton Campbell | | 47.09 | Q |
13 | 4 | Piotr Rysiukiewicz | | 47.19 | |
14 | 5 | Davian Clarke | | 47.20 | Q |
15 | 3 | Robert Maćkowiak | | 47.24 | |
16 | 2 | Sanderlei Claro Parrela | | 47.53 | |
17 | 4 | Alain Rohr | | 47.62 | |
18 | 5 | Troy McIntosh | | 47.66 | |
19 | 5 | Stilianos Dimotsios | | 47.71 | |
20 | 2 | Shane Niemi | | 47.80 | |
21 | 3 | Rohan Pradeep Kumara | | 48.02 | |
22 | 3 | Jude Monye | | 48.05 | |
23 | 3 | Jun Osakada | | 48.13 | |
24 | 1 | Carlos Silva | | 48.45 | |
25 | 5 | Dmitriy Chumichkin | | 48.52 | |
26 | 1 | Sugath Tillakeratne | | 48.82 | |
27 | 1 | Marcelo Figueroa | | 49.35 | |
28 | 5 | Bilal Khalid | | 49.61 | |
| 4 | Bothwell Machihulu | | | |
Semifinals
First 3 of each semifinal qualified directly for the final.
Rank | Heat | Name | Nationality | Time | Notes |
| 1 | Daniel Caines | | 46.43 | Q |
| 2 | Danny McFarlane | | 46.68 | Q |
| 1 | Milton Campbell | | 46.69 | Q |
| 2 | Mark Hylton | | 46.87 | Q |
| 2 | James Davis | | 46.90 | Q |
| 1 | David Canal | | 47.08 | Q |
| 1 | Davian Clarke | | 47.17 | |
| 2 | Félix Sánchez | | 47.29 | |
| 2 | Boris Gorban | | 47.48 | |
10 | 1 | Sunday Bada | | 48.14 | |
11 | 2 | Jimisola Laursen | | 48.17 | |
| 1 | Sofiane Labidi | | | |
Final