2012 European Athletics Championships – Men's 400 metres hurdles

The men's 400 metres hurdles at the 2012 European Athletics Championships was held at the Helsinki Olympic Stadium on 27, 28 and 29 June.

First 3 in each heat (Q) and 6 best performers (q) advance to the Semifinals.

First 2 in each heat (Q) and 2 best performers (q) advance to the Semifinals.