1978 European Athletics Championships – Men's 400 metres

The men's 400 metres at the 1978 European Athletics Championships was held in Prague, then Czechoslovakia, at Stadion Evžena Rošického on 30 and 31 August, and 1 September 1978.

Results
1 September

Semi-finals
31 August

Heats
30 August

Participation
According to an unofficial count, 25 athletes from 14 countries participated in the event.


 * 🇧🇪 belgium (3)
 * undefined (2)
 * undefined (1)
 * undefined (1)
 * 🇫🇮 finland (2)
 * 🇫🇷 france (3)
 * 🇮🇹 italy (1)
 * 🇱🇺 luxembourg (1)
 * undefined (1)
 * 🇵🇱 poland (2)
 * undefined (1)
 * 🇬🇧 united kingdom (3)
 * undefined (3)
 * undefined (1)