2004 IAAF World Indoor Championships – Men's 400 metres

Heat

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

Rank	Heat	Name	Nationality	Time	Notes
1	4	Davian Clarke	Jamaica	46.36	Q
2	4	David Canal	Spain	46.67	Q
3	5	Alleyne Francique	Grenada	46.76	Q
4	4	Zsolt Szeglet	Hungary	46.92	q
5	4	David McCarthy	Ireland	46.94	q
6	2	Sofiane Labidi	Tunisia	46.97	Q
DQ	2	Ioan Lucian Vieru	Romania	47.07	Doping
7	2	Chris Brown	Bahamas	47.08	Q
8	5	Gary Kikaya	Democratic Republic of the Congo	47.09	Q
9	3	Joe Mendel	United States	47.33	Q
10	1	Milton Campbell	United States	47.35	Q
11	3	Casey Vincent	Australia	47.42	Q
11	5	Robert Daly	Ireland	47.42
13	2	Salvador Rodríguez	Spain	47.53
14	3	California Molefe	Botswana	47.58
15	3	Ato Stephens	Trinidad and Tobago	47.62
16	1	Gregory Haughton	Jamaica	47.71	Q
17	3	Chris Lloyd	Dominica	47.78	SB
18	1	Lloyd Zvasiya	Zimbabwe	47.81	SB
19	1	Adam Potter	Great Britain	47.82
20	5	Nagmeldin Ali Abubakr	Sudan	47.85
21	4	Ernie Candelario	Philippines	48.92	SB
22	4	Geoffrey Bai	Papua New Guinea	50.57	SB
23	1	Cheong Man Fong	Macau	55.17	SB
	1	Matija Šestak	Slovenia	DNS
	2	Daryl Vassallo	Gibraltar	DNS
	5	Marcelo Figueroa	El Salvador	DNS

Semifinals

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

Rank	Heat	Name	Nationality	Time	Notes
1	2	Alleyne Francique	Grenada	46.32	Q
2	1	Davian Clarke	Jamaica	46.34	Q
3	1	Gary Kikaya	Democratic Republic of the Congo	46.46	Q, SB
4	1	Joe Mendel	United States	46.56	Q
5	2	Sofiane Labidi	Tunisia	46.61	Q
6	2	Milton Campbell	United States	46.67	Q
7	2	Chris Brown	Bahamas	46.68
8	1	David Canal	Spain	46.70
9	2	Gregory Haughton	Jamaica	46.81
10	2	Zsolt Szeglet	Hungary	47.16
11	1	David McCarthy	Ireland	47.34
12	1	Casey Vincent	Australia	47.68

Final

Rank	Name	Nationality	Time	Notes
	Alleyne Francique	Grenada	45.88	SB
	Davian Clarke	Jamaica	45.92	SB
	Gary Kikaya	Democratic Republic of the Congo	46.30	SB
4	Sofiane Labidi	Tunisia	46.48
5	Milton Campbell	United States	46.74
6	Joe Mendel	United States	47.34