1980 European Athletics Indoor Championships – Men's 400 metres

The men's 400 metres event at the 1980 European Athletics Indoor Championships was held on 1 and 2 March in Sindelfingen.

Heats
The winner of each heat (Q) and the next 3 fastest (q) qualified for the semifinals.

Semifinals
First 2 from each semifinal qualified directly (Q) for the final.