The men's 4 x 100 metres relay event at the 2009 European Athletics U23 Championships was held in Kaunas, Lithuania, at S. Dariaus ir S. Girėno stadionas (Darius and Girėnas Stadium) on 19 July.
| Gold | Ryan Scott Toby Sandeman Rion Pierre Leevan Yearwood | |
| Silver | Emmanuel Biron Mickaël Arminana Pierre-Alexis Pessonneaux Teddy Tinmar  | |
| Bronze | Kamil Kryński Artur Zaczek Olaf Paruzel Jakub Adamski  |
19 July
| Rank | Nation | Competitors | Time | Notes | ||
|---|---|---|---|---|---|---|
| align=left | 39.09 | |||||
| align=left | | 39.26 | ||||
| align=left | | 39.52 | ||||
| 4 | align=left |  | 39.72 | |||
| 5 | align=left | 39.72 | ||||
| 6 | align=left | 39.73 | ||||
| 7 | align=left | 40.06 | ||||
| 8 | align=left | 40.36 |
19 July
Qualified: first 3 in each heat and 2 to the Final
| Rank | Nation | Competitors | Time | Notes | ||
|---|---|---|---|---|---|---|
| 1 | align=left | | 39.77 | Q | ||
| 2 | align=left | 40.06 | Q | |||
| 3 | align=left | 40.13 | Q | |||
| 4 | align=left | 40.21 | q | |||
| 5 | align=left | 40.22 | q |
| Rank | Nation | Competitors | Time | Notes | ||
|---|---|---|---|---|---|---|
| 1 | align=left | 39.85 | Q | |||
| 2 | align=left | | 40.04 | Q | ||
| 3 | align=left | | 40.12 | Q | ||
| 4 | align=left |  | 40.23 | |||
| 5 | align=left |  | 40.67 |
According to an unofficial count, 40 athletes from 10 countries participated in the event.
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