2021 European Athletics U23 Championships – Men's 4 × 100 metres relay

The men's 4 × 100 metres relay event at the 2021 European Athletics U23 Championships was held on Day 4 on July 11 at Kadriorg Stadium in Tallinn, Estonia.

Records
Prior to the competition, the records were as follows:

Round 1
Qualification rule: First 3 in each heat (Q) and the next 2 fastest (q) advance to the Final.