The men's 4 × 100 metres relay event at the 2003 Summer Universiade was held in Daegu, South Korea on 29 and 30 August.
| Rank | Heat | Nation | Athletes | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 1 | 39.63 | Q | |||
| 2 | 2 | 39.77 | Q | |||
| 3 | 2 | 40.17 | Q | |||
| 4 | 1 | 40.48 | Q | |||
| 5 | 1 | 40.56 | Q | |||
| 6 | 1 | 40.56 | q | |||
| 7 | 2 | 40.75 | Q | |||
| 8 | 2 | 42.97 | q | |||
| 9 | 2 | 43.94 | ||||
| 10 | 1 | 44.24 |
| Rank | Lane | Nation | Athletes | Time | Notes | |
|---|---|---|---|---|---|---|
| 5 | 39.45 | |||||
| 4 | 39.67 | |||||
| 3 | 39.99 | |||||
| 4 | 6 | 40.61 | ||||
| 5 | 7 | 40.63 | ||||
| 6 | 2 | 40.81 | ||||
| 7 | 1 | 43.05 | ||||
| 8 |