| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Marek•Gniewkowski | |
| Used name | Marek•Gniewkowski | |
| Born | 30 June 1965 in Warszawa (Warsaw), Mazowieckie |  POL |
| Measurements | 185 cm / 84 kg | |
| Affiliations | AZS Warszawa — Warszawa (Warsaw), Mazowieckie | POL |
| NOC | Poland | POL |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1988 Summer Olympics | Fencing | POL |
Marek Gniewkowski | |||
| Sabre, Team, Men (Olympic) | Poland | 5 | ||||
| 1992 Summer Olympics | Fencing | POL |
Marek Gniewkowski | |||
| Sabre, Individual, Men (Olympic) | 19 | |||||
| Sabre, Team, Men (Olympic) | Poland | 6 |
