400 m, Men
| Competition | 1956 South American Athletics Championships |
|---|---|
| Venue |
Santiago
 CHI
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Jaime Aparicio |  COL |
47.7 | ||
| 🥈 | Zados Guardiola | COL |
48.2 | ||
| 🥉 | Argemiro Roque |  BRA |
49.0 |