| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Joachim Joseph•Gruppelaar | |
| Used name | Joachim•Gruppelaar | |
| Born | 24 October 1911 in Amersfoort, Utrecht |  NED |
| Died | 12 July 1971 (aged 59 years 8 months 19 days) in Renkum, Gelderland | NED |
| NOC | Netherlands | NED |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1948 Summer Olympics | Equestrian Jumping (Equestrian) | NED |
Joachim Gruppelaar | |||
| Individual, Open (Olympic) | Random Harvest | 20 | ||||
| Team, Open (Olympic) | Random Harvest / Netherlands |
