| Event: | Men's 400 metres |
The men's 400 metres event at the 1978 Commonwealth Games was held on 6 and 7 August at the Commonwealth Stadium in Edmonton, Alberta, Canada.[1]
| width=200 bgcolor=gold | Gold | width=200 bgcolor=silver | Silver | width=200 bgcolor=CC9966 | Bronze |
| Rick Mitchell | Joseph Coombs | Glenn Bogue |
Held on 6 August
Qualification: First 5 in each heat (Q) and the next 2 fastest (q) qualify for the quarterfinals.
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 6 | 46.50 | Q | |||
| 2 | 4 | 46.74 | Q | |||
| 3 | 5 | 46.77 | Q | |||
| 4 | 5 | 46.78 | Q | |||
| 5 | 6 | 47.15 | Q | |||
| 6 | 4 | 47.20 | Q | |||
| 7 | 5 | 47.42 | Q | |||
| 7 | 6 | 47.42 | Q | |||
| 9 | 2 | 47.50 | Q | |||
| 10 | 3 | 47.52 | Q | |||
| 11 | 2 | 47.53 | Q | |||
| 12 | 4 | 47.56 | Q | |||
| 13 | 2 | 47.61 | Q | |||
| 14 | 3 | 47.77 | Q | |||
| 15 | 1 | 47.78 | Q | |||
| 16 | 1 | 47.82 | Q | |||
| 17 | 4 | 47.83 | Q | |||
| 18 | 1 | 47.87 | Q | |||
| 19 | 5 | 47.93 | Q | |||
| 20 | 1 | 47.97 | Q | |||
| 21 | 6 | 48.02 | Q | |||
| 22 | 4 | 48.14 | Q | |||
| 23 | 2 | 48.26 | Q | |||
| 24 | 3 | 48.27 | Q | |||
| 25 | 6 | 48.30 | Q | |||
| 26 | 3 | 48.31 | Q | |||
| 27 | 2 | 48.46 | Q | |||
| 28 | 1 | 48.49 | Q | |||
| 29 | 3 | 48.53 | Q | |||
| 30 | 6 | 48.77 | q | |||
| 31 | 2 | 48.78 | q | |||
| 32 | 3 | 48.80 | ||||
| 33 | 1 | 48.86 | ||||
| 34 | 5 | 49.19 | Q | |||
| 35 | 4 | 49.42 | ||||
| 36 | 6 | 49.64 | ||||
| 37 | 5 | 50.04 | ||||
| 38 | 2 | 50.15 | ||||
| 39 | 4 | 50.76 | ||||
| 40 | 5 | 50.98 | ||||
| 41 | 3 | 51.15 | ||||
| 42 | 1 | 51.39 |
Held on 6 August
Qualification: First 3 in each heat (Q) and the next 4 fastest (q) qualify for the semifinals.
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 3 | 46.06 | Q | |||
| 2 | 2 | 46.27 | Q | |||
| 3 | 4 | 46.36 | Q | |||
| 4 | 1 | 46.38 | Q | |||
| 5 | 2 | 46.40 | Q | |||
| 6 | 3 | 46.43 | Q | |||
| 7 | 3 | 46.45 | Q | |||
| 8 | 2 | 46.46 | Q | |||
| 9 | 1 | 46.52 | Q | |||
| 10 | 1 | 46.59 | Q | |||
| 11 | 2 | 46.66 | q | |||
| 12 | 2 | 46.71 | q | |||
| 13 | 1 | 46.77 | q | |||
| 14 | 4 | 46.80 | Q | |||
| 15 | 4 | 46.89 | Q | |||
| 16 | 1 | 47.07 | q | |||
| 17 | 1 | 47.20 | ||||
| 18 | 3 | 47.21 | ||||
| 19 | 4 | 47.31 | ||||
| 20 | 1 | 47.41 | ||||
| 21 | 4 | 47.41 | ||||
| 22 | 3 | 47.44 | ||||
| 23 | 4 | 47.77 | ||||
| 24 | 3 | 47.83 | ||||
| 25 | 3 | 47.84 | ||||
| 26 | 4 | 48.20 | ||||
| 27 | 4 | 48.29 | ||||
| 28 | 2 | 48.35 | ||||
| 29 | 2 | 48.77 | ||||
| 30 | 3 | 48.99 | ||||
| 31 | 2 | 50.45 | ||||
| 1 |
Held on 7 August
Qualification: First 4 in each semifinal (Q) qualify directly for the final.
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 1 | 46.86 | Q | |||
| 2 | 1 | 46.87 | Q | |||
| 3 | 1 | 46.88 | Q | |||
| 3 | 2 | 46.88 | Q | |||
| 5 | 2 | 47.00 | Q | |||
| 6 | 1 | 47.32 | Q | |||
| 6 | 2 | 47.32 | Q | |||
| 8 | 1 | 47.37 | ||||
| 9 | 1 | 47.41 | ||||
| 10 | 2 | 47.61 | Q | |||
| 11 | 1 | 47.62 | ||||
| 12 | 2 | 47.64 | ||||
| 13 | 2 | 47.85 | ||||
| 14 | 2 | 48.05 | ||||
| 15 | 2 | 48.25 | ||||
| 16 | 1 | 48.55 |
Held on 7 August
| Rank | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|
| 46.34 | |||||
| 46.54 | |||||
| 46.63 | |||||
| 4 | 46.97 | ||||
| 5 | 46.99 | ||||
| 6 | 47.32 | ||||
| 7 | 47.51 | ||||
| 8 | 48.01 |