2009 Asian Athletics Championships – Women's 400 metres
# 2009 Asian Athletics Championships – Women's 400 metres

The women's 400 metres event at the 2009 Asian Athletics Championships was held at the Guangdong Olympic Stadium on November 10–11.

## Medalists

| Gold | Silver | Bronze |
| - | - | - |
| Asami Tanno Japan | Chen Lin China | Manjeet Kaur India |

## Results

### Heats

| Rank | Heat | Name | Nationality | Time | Notes |
| - | - | - | - | - | - |
| 1 | 1 | Asami Tanno | Japan | 52.78 | Q |
| 2 | 1 | Mandeep Kaur | India | 53.19 | Q |
| 3 | 1 | Tang Xiaoyin | China | 53.50 | Q |
| 4 | 1 | Marina Maslyonko | Kazakhstan | 53.66 | q |
| 5 | 2 | Chen Lin | China | 53.68 | Q |
| 6 | 2 | Manjeet Kaur | India | 53.87 | Q |
| 7 | 2 | Mayu Sato | Japan | 54.49 | Q |
| 8 | 1 | Treewadee Yongphan | Thailand | 55.11 | q, PB |
| 9 | 1 | Chandrika Subashini Rasnayake | Sri Lanka | 55.32 | |
| 10 | 2 | Saowalee Kaechuay | Thailand | 56.09 | SB |
| 11 | 2 | Maryam Tousi | Iran | 57.01 | |
| 12 | 1 | Nguyen Thi Thuy | Vietnam | 57.77 | |
| 13 | 2 | Esso Gulstan | Iraq | 58.59 | |
| 14 | 1 | Leong Ka Man | Macau | 59.40 | |
| 15 | 2 | Pramila Rijal | Nepal | 1:00.47 | |
| | 2 | Olga Tereshkova | Kazakhstan | DNS | |

### Final

| Rank | Lane | Name | Nationality | Time |
| - | - | - | - | - |
| | 6 | Asami Tanno | Japan | 53.32 |
| | 4 | Chen Lin | China | 53.55 |
| | 3 | Manjeet Kaur | India | 53.66 |
| 4 | 5 | Mandeep Kaur | India | 53.76 |
| 5 | 2 | Marina Maslyonko | Kazakhstan | 53.78 |
| 6 | 7 | Tang Xiaoyin | China | 54.10 |
| 7 | 8 | Mayu Sato | Japan | 55.52 |
| 8 | 1 | Treewadee Yongphan | Thailand | 55.56 |
