Athletics at the 1991 Summer Universiade – Men's 400 metres
The men's 400 metres event at the 1991 Summer Universiade was held at the Don Valley Stadium in Sheffield on 21 and 22 July 1991.
Medalists
| Gold | Silver | Bronze |
Patrick O'Connor Jamaica
|
Benyounés Lahlou Morocco
|
Marlin Cannon United States
|
Results
Heats
| Rank | Heat | Athlete | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 3 | Michael Joubert |  Australia |
47.50 | Q[1] |
Quarterfinals
| Rank | Heat | Athlete | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 2 | 2 | Michael Joubert | Australia |
47.17 | Q[1] |
Semifinals
| Rank | Heat | Athlete | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 3 | 2 | Michael Joubert | Australia |
46.37 | Q[1] |
Final
| Rank | Athlete | Nationality | Time | Notes |
|---|---|---|---|---|
 |
Patrick O'Connor | Jamaica |
45.52 | |
 |
Benyounés Lahlou | Morocco |
45.55 | |
 |
Marlin Cannon | United States |
45.78 | |
| 4 | Dmitriy Kliger |  Soviet Union |
46.24 | |
| 5 | Shunji Karube |  Japan |
46.49 | |
| 6 | Calvin Henry |  Great Britain |
46.51 | |
| Gabriel Luke | United States |
DQ | ||
| Michael Joubert | Australia |
DQ |