1990 European Athletics Indoor Championships – Men's 400 metres

The men's 400 metres event at the 1990 European Athletics Indoor Championships was held in Kelvin Hall on 3 and 4 March.

Heats
First 2 from each heat (Q) and the next 2 fastest (q) qualified for the semifinals.

Semifinals
First 2 from each semifinal (Q) and the next 1 fastest (q) qualified for the final.