The women's 400 metres hurdles at the 2018 European Athletics Championships takes place at the Olympic Stadium on 7, 8 and 10 August.

[1] All times are local times (UTC+2) First 3 in each heat (Q) and the next fastest 3 (q) advance to the Semifinals.

[2] 12 fastest entrants awarded bye to Semifinals.

First 2 (Q) and next 2 fastest (q) qualify for the final.

[3] [4] This athletics and track and field article is a stub.