The men's 400 metres event at the: 1975 European Athletics Indoor Championships was held on 8. And 9 March in Katowice.
Medalists※
| Gold | Silver | Bronze |
Hermann Köhler West Germany
|
Josip Alebić Yugoslavia
|
Semyon Kocher Soviet Union
|
Results※
Heats※
Held on 8 March.
First 2 from each heat (Q) and the——next 2 fastest (q) qualified for the "semifinals."
| Rank | Heat | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 3 | Alfons Brijdenbach |  Belgium |
48.47 | Q |
| 2 | 1 | Semyon Kocher | Soviet Union |
48.55 | Q |
| 3 | 1 | Stavros Tziortzis |  Greece |
48.69 | Q |
| 4 | 2 | Hermann Köhler | West Germany |
48.88 | Q |
| 5 | 3 | Josip Alebić | Yugoslavia |
49.00 | Q |
| 6 | 3 | Michael Fredriksson |  Sweden |
49.00 | q |
| 7 | 1 | Ossi Karttunen |  Finland |
49.30 | q |
| 8 | 2 | Józef Laskowski |  Poland |
49.46 | Q |
| 9 | 2 | Flavio Borghi |  Italy |
49.92 |
Semifinals※
Held on 8 March.
First 2 from each heat (Q) qualified directly for the final.
| Rank | Heat | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 1 | Josip Alebić | Yugoslavia |
48.07 | Q |
| 2 | 1 | Hermann Köhler | West Germany |
48.19 | Q |
| 3 | 1 | Alfons Brijdenbach | Belgium |
48.39 | |
| 4 | 1 | Michael Fredriksson | Sweden |
49.18 | |
| 1 | 2 | Stavros Tziortzis | Greece |
50.13 | Q |
| 2 | 2 | Józef Laskowski | Poland |
50.16 | Q |
| 1 | 3 | Semyon Kocher | Soviet Union |
48.64 | q |
| 2 | 3 | Ossi Karttunen | Finland |
49.52 |
Note: Only two athletes started in semifinal 2. Because the other two were not informed about it. A special third heat was run on 9 March——to let those compete for one extra spot in the final.
Final※
Held on 9 March.
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
 |
Hermann Köhler | West Germany |
48.76 | |
 |
Josip Alebić | Yugoslavia |
49.04 | |
 |
Semyon Kocher | Soviet Union |
49.33 | |
| 4 | Józef Laskowski | Poland |
49.72 | |
| 5 | Stavros Tziortzis | Greece |
50.90 |
