The men's 100 metres at the 1978 European Athletics Championships was held in Praha, then Czechoslovakia, at Stadion Evžena Rošického on 29 and 30 August 1978.
30 August Wind: 0.0m/s
30 August
Wind: 0m/s
Wind: -0.8m/s
29 August
Wind: 0m/s
Wind: 0m/s
Wind: 0m/s
Wind: 0m/s
According to an unofficial count, 28 athletes from 15 countries participated in the event.