1946 European Athletics Championships
Track events
100 m	men	women
200 m	men	women
400 m	men
800 m	men
1500 m	men
5000 m	men
10,000 m	men
80 m hurdles		women
110 m hurdles	men
400 m hurdles	men
3000 m steeplechase	men
4 × 100 m relay	men	women
4 × 400 m relay	men
Road events
Marathon	men
50 km walk	men
Field events
High jump	men	women
Pole vault	men
Long jump	men	women
Triple jump	men
Shot put	men	women
Discus throw	men	women
Hammer throw	men
Javelin throw	men	women
Combined events
Decathlon	men
v t e

The men's 400 metres at the 1946 European Athletics Championships was held in Oslo, Norway, at Bislett Stadion on 22 and 23 August 1946.^[1]

Gold	Niels Holst-Sørensen  Denmark
Silver	Jacques Lunis  France
Bronze	Derek Pugh  Great Britain

23 August

Rank	Name	Nationality	Time	Notes
	Niels Holst-Sørensen	Denmark	47.9
	Jacques Lunis	France	48.3
	Derek Pugh	Great Britain	48.9
4	Sven-Erik Nolinge	Sweden	48.9
5	William Roberts	Great Britain	49.5
	Herman Kunnen	Belgium	DNS

22 August

Rank	Name	Nationality	Time	Notes
1	Jacques Lunis	France	48.6	Q
2	Derek Pugh	Great Britain	48.9	Q
3	Oskar Hardmeier	Switzerland	49.5
4	Anton Blok	Netherlands	49.6
5	Gunnar Bergsten	Denmark	50.3
6	Kjartan Jóhannsson	Iceland	50.7	NR

Rank	Name	Nationality	Time	Notes
1	Niels Holst-Sørensen	Denmark	48.2	Q
2	William Roberts	Great Britain	48.5	Q
3	Stig Lindgård	Sweden	48.7
4	Sergey Komarov	Soviet Union	48.8
5	Adam Piaskowy	Poland	52.6

Rank	Name	Nationality	Time	Notes
1	Herman Kunnen	Belgium	48.9	Q
2	Sven-Erik Nolinge	Sweden	49.0	Q
3	Luigi Paterlini	Italy	49.1
4	Leopold Láznička	Czechoslovakia	50.4

According to an unofficial count, 15 athletes from 12 countries participated in the event.