18 February 2016 Last updated at 11:41 GMT
The black saloon car hit the man at about 18:50 GMT as he crossed Copyground Lane on 9 February.
Police have appealed for the driver and witnesses who came to help the victim, to come forward
The man was taken to hospital for treatment and has since been discharged.
A 50-year-old man was left with knee injuries after a car hit him in High Wycombe before driving off.