The men's 400 metres hurdles at the 1998 European Athletics Championships was held at the Népstadion on 18, 19 and 20 August.
Qualification: First 3 in each heat (Q) and the next 4 fastest (q) advance to the Semifinals.
Qualification: First 3 in each heat (Q) and the next 2 fastest (q) advance to the Final.