2001 IAAF World Indoor Championships – Men's 400 metres

The first two of each heat (Q) and the next 2 fastest (q) qualified for the semifinals.

Rank	Heat	Name	Nationality	Time	Notes
1	2	Daniel Caines	Great Britain	46.65	Q
2	1	Mark Hylton	Great Britain	46.79	Q
3	1	Jimisola Laursen	Sweden	46.82	Q, SB
4	2	David Canal	Spain	46.85	Q
5	3	Danny McFarlane	Jamaica	46.90	Q, PB
6	1	Boris Gorban	Russia	46.91	q
6	2	Sunday Bada	Nigeria	46.91	q
8	4	Sofiane Labidi	Tunisia	46.93	Q, NR
9	4	James Davis	United States	47.01	Q
10	4	Andrey Semyonov	Russia	47.01
11	3	Félix Sánchez	Dominican Republic	47.02	Q
12	5	Milton Campbell	United States	47.09	Q
13	4	Piotr Rysiukiewicz	Poland	47.19
14	5	Davian Clarke	Jamaica	47.20	Q
15	3	Robert Maćkowiak	Poland	47.24
16	2	Sanderlei Claro Parrela	Brazil	47.53
17	4	Alain Rohr	Switzerland	47.62
18	5	Troy McIntosh	Bahamas	47.66
19	5	Stilianos Dimotsios	Greece	47.71
20	2	Shane Niemi	Canada	47.80
21	3	Rohan Pradeep Kumara	Sri Lanka	48.02
22	3	Jude Monye	Nigeria	48.05
23	3	Jun Osakada	Japan	48.13
24	1	Carlos Silva	Portugal	48.45
25	5	Dmitriy Chumichkin	Azerbaijan	48.52
26	1	Sugath Tillakeratne	Sri Lanka	48.82
27	1	Marcelo Figueroa	El Salvador	49.35
28	5	Bilal Khalid	Bahrain	49.61
	4	Bothwell Machihulu	Zambia	DQ

First 3 of each semifinal (Q) qualified directly for the final.

Rank	Heat	Name	Nationality	Time	Notes
1	1	Daniel Caines	Great Britain	46.43	Q
2	2	Danny McFarlane	Jamaica	46.68	Q
3	1	Milton Campbell	United States	46.69	Q
4	2	Mark Hylton	Great Britain	46.87	Q
5	2	James Davis	United States	46.90	Q
6	1	David Canal	Spain	47.08	Q
7	1	Davian Clarke	Jamaica	47.17
8	2	Félix Sánchez	Dominican Republic	47.29
9	2	Boris Gorban	Russia	47.48
10	1	Sunday Bada	Nigeria	48.14
11	2	Jimisola Laursen	Sweden	48.17
	1	Sofiane Labidi	Tunisia	DQ