2017 European Athletics Indoor Championships – Men's 400 metres

The men's 400 metres event at the 2017 European Athletics Indoor Championships was held on 3 March 2017 at 10:20 (heats), at 18:05 (semifinals) and on 4 March 20:33 (final) local time.

Heats
Qualification: First 2 in each heat (Q) and the next 2 fastest (q) advance to the Semifinal.

Semifinals
Qualification: First 3 in each heat (Q) advance to the Final.