The men's 400 metres event at the 2005 Asian Athletics Championships was held in Incheon, South Korea on September 1–3.
Medalists
edit| Gold | Silver | Bronze |
Yuzo Kanemaru Japan
|
Prasanna Amarasekara Sri Lanka
|
Rohan Pradeep Kumara Sri Lanka
|
Results
editHeats
edit| Rank | Heat | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 2 | Rohan Pradeep Kumara | Sri Lanka |
46.46 | Q |
| 2 | 1 | Yuki Yamaguchi | Japan |
46.56 | Q |
| 3 | 2 | Hamdan Al-Bishi |  Saudi Arabia |
46.59 | Q |
| 4 | 1 | Prasanna Amarasekara | Sri Lanka |
46.69 | Q |
| 5 | 2 | Yuzo Kanemaru | Japan |
46.86 | Q |
| 6 | 1 | Cho Sung-Kwon |  South Korea |
47.10 | Q, SB |
| 7 | 1 | Reza Bouazar |  Iran |
47.13 | q, SB |
| 7 | 2 | Mohammad Akefian | Iran |
47.13 | q |
| 9 | 1 | Mohamed Salim Al-Rawahi |  Oman |
47.44 | NJR |
| 10 | 1 | Fawzi Al-Shammari |  Kuwait |
47.83 | |
| 11 | 2 | Jimar Aing |  Philippines |
48.06 | |
| 12 | 1 | Boris Khamzin |  Kazakhstan |
48.18 | |
| 13 | 2 | Muhd Firdaus Bin Juhari |  Singapore |
48.73 | |
| 14 | 1 | Ernie Candelario | Philippines |
49.00 | |
| 15 | 2 | Choi Myong-Joon | South Korea |
49.20 | |
| 16 | 2 | Abdul Qadeer Ghani Zada |  Afghanistan |
53.68 | PB |
Final
edit| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
 |
Yuzo Kanemaru | Japan |
46.04 | |
 |
Prasanna Amarasekara | Sri Lanka |
46.48 | |
 |
Rohan Pradeep Kumara | Sri Lanka |
46.52 | |
| 4 | Hamdan Al-Bishi | Saudi Arabia |
46.55 | |
| 5 | Yuki Yamaguchi | Japan |
46.65 | |
| 6 | Mohammad Akefian | Iran |
46.93 | |
| 7 | Reza Bouazar | Iran |
47.58 | |
| 8 | Cho Sung-Kwon | South Korea |
47.81 |