1991 IAAF World Indoor Championships – Men's 400 metres
# 1991 IAAF World Indoor Championships – Men's 400 metres

The men's 400 metres event at the 1991 IAAF World Indoor Championships was held on 8, 9 and 10 March.

## Medalists

| Gold | Silver | Bronze |
| - | - | - |
| Devon Morris Jamaica | Samson Kitur Kenya | Cayetano Cornet Spain |

## Results

### Heats

First 2 of each heat (Q) and next 4 fastest (q) qualified for the semifinals.

| Rank | Heat | Name | Nationality | Time | Notes |
| - | - | - | - | - | - |
| 1 | 1 | Ian Morris | Trinidad and Tobago | 47.03 | Q |
| 2 | 2 | Samson Kitur | Kenya | 47.04 | Q |
| 3 | 1 | Cayetano Cornet | Spain | 47.11 | Q |
| 3 | 2 | Howard Burnett | Jamaica | 47.11 | Q |
| 5 | 3 | Charles Jenkins Jr. | United States | 47.17 | Q |
| 6 | 2 | Raymond Pierre | United States | 47.18 | q |
| 7 | 4 | Alvin Daniel | Trinidad and Tobago | 47.19 | Q |
| 8 | 3 | Devon Morris | Jamaica | 47.28 | Q |
| 9 | 4 | Antonio Sánchez | Spain | 47.33 | Q |
| 10 | 4 | Mark Garner | Australia | 47.52 | q |
| 11 | 4 | Abdelali Kasbane | Morocco | 47.56 | q, NR |
| 12 | 1 | Paul Greene | Australia | 47.67 | q |
| 13 | 3 | Amar Hecini | Algeria | 47.95 | |
| 14 | 1 | Christopher Nibilo | Tanzania | 48.40 | NR |
| 15 | 1 | Benyounés Lahlou | Morocco | 48.94 | |
| 16 | 4 | Roberto Bortolotto | Brazil | 49.07 | |
| 17 | 2 | Christian Boda | Mauritius | 49.47 | |
| 18 | 3 | Inaldo Justino Sena | Brazil | 49.49 | |
| 19 | 2 | Julio Caballero | Paraguay | 50.95 | NR |
| | 2 | Dmitriy Golovastov | Soviet Union | DNF | |
| | 3 | Desi Wynter | United States Virgin Islands | DQ | |
| | 1 | Ali Faudet | Chad | DNS | |
| | 3 | Morris Okinda | Tanzania | DNS | |
| | 4 | Ahmed Abdelhalim Ghanem | Egypt | DNS | |

### Semifinals

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

| Rank | Heat | Name | Nationality | Time | Notes |
| - | - | - | - | - | - |
| 1 | 1 | Devon Morris | Jamaica | 46.30 | Q |
| 2 | 2 | Samson Kitur | Kenya | 46.43 | Q, NR |
| 3 | 1 | Charles Jenkins Jr. | United States | 46.55 | Q |
| 4 | 2 | Howard Burnett | Jamaica | 46.62 | Q |
| 5 | 1 | Cayetano Cornet | Spain | 46.69 | Q |
| 6 | 2 | Alvin Daniel | Trinidad and Tobago | 47.03 | Q |
| 7 | 1 | Abdelali Kasbane | Morocco | 47.05 | NR |
| 8 | 1 | Mark Garner | Australia | 47.06 | |
| 9 | 2 | Paul Greene | Australia | 47.20 | |
| 10 | 2 | Raymond Pierre | United States | 47.51 | |
| 11 | 2 | Antonio Sánchez | Spain | 47.59 | |
| | 1 | Ian Morris | Trinidad and Tobago | DNF | |

### Final

| Rank | Name | Nationality | Time | Notes |
| - | - | - | - | - |
| | Devon Morris | Jamaica | 46.17 | PB |
| | Samson Kitur | Kenya | 46.21 | NR |
| | Cayetano Cornet | Spain | 46.52 | |
| 4 | Charles Jenkins Jr. | United States | 47.18 | |
| 5 | Howard Burnett | Jamaica | 47.84 | |
| 6 | Alvin Daniel | Trinidad and Tobago | 1:32.39 | |
