# 2021 European Athletics Indoor Championships – Men's 400 metres

The men's 400 metres event at the 2021 European Athletics Indoor Championships was held on 5 March 2021 at 10:13 (heats) and at 19:10 (semi-finals), and on 6 March 2021 at 20:10 (final) local time.

## Records

Standing records prior to the 2021 European Athletics Indoor Championships :
| World record | Kerron Clement (USA) | 44.57 | Fayetteville, United States | 12 March 2005 |
| European record | Thomas Schönlebe (GDR) | 45.05 | Sindelfingen, West Germany | 5 February 1988 |
| European record | Karsten Warholm (NOR) | 45.05 | Glasgow, United Kingdom | 2 March 2019 |
| Championship record | Karsten Warholm (NOR) | 45.05 | Glasgow, United Kingdom | 2 March 2019 |
| World Leading | Fred Kerley (USA) | 45.03 | Fayetteville, United States | 24 January 2021 |
| European Leading | Liemarvin Bonevacia (NED) | 45.99 | Apeldoorn, Netherlands | 21 February 2021 |

## Results
### Heats

Qualification: First 2 in each heat (Q) advance to the Semifinals.
| Rank | Heat | Athlete | Nationality | Time | Note |
| 1 | 6 | Tony van Diepen | Netherlands | 46.54 | Q |
| 2 | 4 | Carl Bengtström | Sweden | 46.56 | Q |
| 3 | 6 | Lee Thompson | Great Britain | 46.69 | Q |
| 4 | 9 | Liemarvin Bonevacia | Netherlands | 46.69 | Q |
| 5 | 1 | Luka Janežič | Slovenia | 46.73 | Q, SB |
| 6 | 9 | Ricky Petrucciani | Switzerland | 46.76 | Q, PB |
| 7 | 7 | Marvin Schlegel | Germany | 46.77 | Q |
| 8 | 1 | Vladimir Aceti | Italy | 46.82 | Q |
| 9 | 3 | Óscar Husillos | Spain | 46.83 | Q |
| 10 | 4 | James Williams | Great Britain | 46.85 | Q |
| 11 | 8 | Pavel Maslák | Czech Republic | 46.88 | Q |
| 12 | 9 | Lucas Búa | Spain | 46.92 | |
| 13 | 7 | İlyas Çanakçı | Turkey | 46.92 | Q |
| 14 | 8 | Kajetan Duszyński | Poland | 46.94 | Q |
| 15 | 1 | Dylan Borlée | Belgium | 46.99 | SB |
| 16 | 1 | Samuel García | Spain | 47.02 | |
| 17 | 2 | Jochem Dobber | Netherlands | 47.05 | Q |
| 18 | 3 | Christian Iguacel | Belgium | 47.07 | Q, PB |
| 19 | 8 | Joe Brier | Great Britain | 47.08 | |
| 20 | 4 | Alexander Doom | Belgium | 47.18 | |
| 21 | 2 | Patrik Šorm | Czech Republic | 47.21 | Q |
| 22 | 6 | Berke Akçam | Turkey | 47.33 | |
| 23 | 3 | Henrik Krause | Germany | 47.39 | |
| 24 | 5 | Franko Burraj | Albania | 47.42 | Q |
| 25 | 2 | Lovro Mesec Košir | Slovenia | 47.47 | |
| 26 | 1 | Mateo Ružić | Croatia | 47.49 | SB |
| 27 | 8 | Mykyta Barabanov | Ukraine | 47.51 | |
| 28 | 5 | Robert Parge | Romania | 47.58 | Q |
| 29 | 5 | Vít Müller | Czech Republic | 47.60 | |
| 30 | 9 | Danylo Danylenko | Ukraine | 47.65 | |
| 31 | 9 | Gustav Lundholm Nielsen | Denmark | 47.65 | |
| 32 | 6 | Mauro Pereira | Portugal | 47.69 | |
| 33 | 3 | Charles Devantay | Switzerland | 47.77 | |
| 34 | 7 | Gregor Grahovac | Slovenia | 47.84 | |
| 35 | 6 | Mindia Endeladze | Georgia | 47.85 | |
| 35 | 7 | Filippo Moggi | Switzerland | 47.85 | |
| 37 | 4 | Boško Kijanović | Serbia | 47.89 | |
| 38 | 1 | Šimon Bujna | Slovakia | 47.93 | |
| 39 | 5 | Oleksandr Pohorilko | Ukraine | 47.95 | |
| 40 | 8 | Kubilay Ençü | Turkey | 48.02 | |
| 41 | 5 | Ricardo dos Santos | Portugal | 48.06 | |
| 42 | 3 | Mihai Cristian Pîslaru | Romania | 48.11 | |
| 43 | 2 | Lorenzo Benati | Italy | 48.24 | |
| 44 | 4 | Tony Nõu | Estonia | 48.42 | |
| 45 | 2 | Martin Kučera | Slovakia | 48.44 | |
| 46 | 4 | Ilja Petrušenko | Latvia | 48.46 | SB |
| 47 | 3 | Dániel Huller | Hungary | 48.52 | |
| 48 | 2 | Jovan Stojoski | North Macedonia | 48.60 | |
| | 7 | Thomas Jordier | France | DQ | |

### Semifinals

Qualification: First 2 in each heat (Q) advance to the Final.
| Rank | Heat | | | Time | Note |
| 1 | 1 | Tony van Diepen | Netherlands | 46.06 | Q, PB |
| 2 | 1 | Óscar Husillos | Spain | 46.26 | Q, SB |
| 3 | 1 | Vladimir Aceti | Italy | 46.55 | PB |
| 4 | 3 | Jochem Dobber | Netherlands | 46.56 | Q |
| 5 | 3 | Carl Bengtström | Sweden | 46.67 | Q |
| 6 | 1 | Pavel Maslák | Czech Republic | 46.70 | |
| 7 | 3 | Ricky Petrucciani | Switzerland | 46.72 | PB |
| 8 | 2 | Liemarvin Bonevacia | Netherlands | 46.75 | Q |
| 9 | 1 | James Williams | Great Britain | 46.94 | |
| 10 | 3 | Marvin Schlegel | Germany | 47.02 | |
| 11 | 2 | Luka Janežič | Slovenia | 47.25 | Q |
| 12 | 2 | Kajetan Duszyński | Poland | 47.26 | |
| 13 | 2 | Lee Thompson | Great Britain | 47.42 | |
| 14 | 2 | Franko Burraj | Albania | 47.45 | |
| 15 | 3 | İlyas Çanakçı | Turkey | 47.60 | |
| 16 | 3 | Patrik Šorm | Czech Republic | 47.69 | |
| 17 | 2 | Christian Iguacel | Belgium | 47.78 | |
| 18 | 1 | Robert Parge | Romania | 48.35 | |

### Final

| Rank | Lane | Athlete | Nationality | Time | Note |
| | 4 | Óscar Husillos | Spain | 46.22 | SB |
| | 6 | Tony van Diepen | Netherlands | 46.25 | |
| | 3 | Liemarvin Bonevacia | Netherlands | 46.30 | |
| 4 | 2 | Carl Bengtström | Sweden | 46.42 | |
| 5 | 5 | Jochem Dobber | Netherlands | 46.82 | |
| 6 | 1 | Luka Janežič | Slovenia | 47.22 | |