Tjow Choon Boon was a Singaporean cyclist who was active during the mid-1960s. In 1963 Tjow was part of the quartet that won silver in the team time trial at the Asian Cycling Championships in Kuala Lumpur. The following year he was selected to represent Malaysia on both the road and track at the 1964 Tokyo Olympics, riding in the team time trial and the individual pursuit, respectively. That same year Tjow had success at the Tour of Malaysia with a stage win.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | Nationality | As | |
|---|---|---|---|---|---|---|---|
| 1964 Summer Olympics | Cycling Road (Cycling) | Tjow Choon Boon | |||||
| Team Time Trial, Men (Olympic) | Malaysia | 32 | |||||
| Cycling Track (Cycling) | Tjow Choon Boon | ||||||
| Individual Pursuit, Men (Olympic) | AC r1/4 |