The men's 400 metres hurdles event at the 1974 British Commonwealth Games was held on 27 and 29 January at the Queen Elizabeth II Park in Christchurch, New Zealand.

[1] Held on 27 January The first 5 in each heat (Q) and the next 1 fastest (q) qualified for the semifinals.

Held on 27 January The first 4 in each semifinal (Q) qualified directly for the final.

Held on 29 January