The men's 4x400 metres relay event at the 2015 European Athletics U23 Championships was held in Tallinn, Estonia, at Kadriorg Stadium on 12 July.
| Gold | Ludvy Vaillant Alexandre Divet Nicolas Courbière Thomas Jordier  | |
| Silver | Kajetan Duszyński Patryk Dobek Bartłomiej Chojnowski Karol Zalewski  | |
| Bronze | Jakob Krempin Alexander Gladitz Torben Junker Marc Koch |
12 July
| Rank | Name | Nationality | Reaction Time | Time | Notes | ||
|---|---|---|---|---|---|---|---|
| align=left | | Ludvy Vaillant Alexandre Divet Nicolas Courbière Thomas Jordier | 0.159 | 3:04.92 | NUR | ||
| align=left | | Kajetan Duszyński Patryk Dobek Bartłomiej Chojnowski Karol Zalewski | 0.190 | 3:05.35 | |||
| align=left | Jakob Krempin Alexander Gladitz Torben Junker Marc Koch | 0.202 | 3:05.97 | ||||
| 4 | align=left |  | Albert Holibka Michal Desenský Michal Tlustý Patrik Šorm | 0.184 | 3:07.27 | ||
| 5 | align=left |  | Oleksiy Matskevych Oleksiy Pozdnyakov Maksym Lyabin Danylo Danylenko | 0.180 | 3:09.14 | ||
| 6 | align=left |  | Joachim Sandberg Simen Sigurdsen Håkon Solli Henriksen Torbjørn Fossum Heldal | 0.136 | 3:09.66 | NUR | |
| align=left |  | Artyom Denmukhametov Nikita Polyakov Andrey Chernyshov Pavel Ivashko | 0.160 | DQ |
According to an unofficial count, 28 athletes from 7 countries participated in the event.