1973 European Athletics Indoor Championships – Men's 400 metres

The men's 400 metres event at the 1973 European Athletics Indoor Championships was held on 10 and 11 March in Rotterdam.

Heats
Held on 10 March.

First 2 from each heat (Q) qualified directly for the semifinals.

Semifinals
Held on 10 March.

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

Final
Held on 11 March.