Athletics at the 1974 British Commonwealth Games – Men's 400 metres

The men's 400 metres event at the 1974 British Commonwealth Games was held on 25 and 26 January at the Queen Elizabeth II Park in Christchurch, New Zealand.

Heats
Held on 25 January

Qualification: First 3 in each heat (Q) and the next 1 fastest (q) qualify for the semifinals.

Semifinals
Held on 26 January

Qualification: First 4 in each semifinal (Q) qualify directly for the final.

Final
Held on 26 January