The men's 4 × 400 metres relay event at the 2023 European Athletics U23 Championships was held in Espoo, Finland, at Leppävaara Stadium on 15 and 16 July.

[1] Prior to the competition, the records were as follows: Qualification rule: First 3 in each heat (Q) and the next 2 fastest (q) advance to the Final.

[2][3][4][5] [6]