| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Jang•Jae-Geun |
| Used name | Jang•Jae-Geun |
| Name order | Oriental |
| Original name | 장•재근 |
| Other names | Jang Jae-Keun |
| Born | 2 January 1962 |
| Measurements | 184 cm / 76 kg |
| NOC | Republic of Korea |
Personal Bests: 100 – 10.35 (1985); 200 – 20.41 (1985).
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1984 Summer Olympics | Athletics | KOR |
Jang Jae-Geun | |||
| 200 metres, Men (Olympic) | 6 h2 r2/4 | |||||
| 1988 Summer Olympics | Athletics | KOR |
Jang Jae-Geun | |||
| 100 metres, Men (Olympic) | ||||||
| 200 metres, Men (Olympic) | 6 h4 r2/4 | |||||
| 4 × 100 metres Relay, Men (Olympic) | Republic of Korea | 7 h1 r2/3 | ||||
| 4 × 400 metres Relay, Men (Olympic) | Republic of Korea |