| Event: | Men's singles |
| Games: | 2004 Summer |
| Venue: | Goudi Olympic Hall |
| Date: | 14–21 August |
| Competitors: | 32 |
| Nations: | 21 |
| Gold: | Taufik Hidayat |
| Goldnoc: | INA |
| Silver: | Shon Seung-mo |
| Silvernoc: | KOR |
| Bronze: | Sony Dwi Kuncoro |
| Bronzenoc: | INA |
| Prev: | 2000 Sydney |
| Next: | 2008 Beijing |
These are the results of the men's singles competition in badminton at the 2004 Summer Olympics in Athens.
The tournament consisted of a single-elimination tournament. Matches were played using a best-of-three games format. Games were played to 15 points, using the old scoring system. Each game had to be won by a margin of two points.
The top eight seeds in the tournament were placed in the bracket so as not to face each other until the quarterfinals. All other competitors were placed by draw.