The men's 4 × 400 metres relay event at the 2017 European Athletics U23 Championships was held in Bydgoszcz, Poland, at the Zdzisław Krzyszkowiak Stadium on 15 and 16 July.
*Athletes who ran in heats only 16 July[1] Qualification rule: First 3 in each heat (Q) and the next 2 fastest (q) qualified for the final.
16 July[3]