| Birth Date: | 1946 10, df=y |
| Birth Place: | Beverwijk, the Netherlands |
| Sport: | Cycling |
| Show-Medals: | yes |
Adri Duycker (born 13 October 1946) is a retired Dutch cyclist. He was part of the Dutch teams, that won a silver and bronze medals in the 1970 and 1971 UCI Road World Championships in the team time trial.