Police have appealed for witnesses to an accident which closed the A361 between Seend Fork and Caen Hill in both directions today.
The accident at the entrance to Caen Hill Marina, Lower Foxhangers, involved a motorcycle and a car.
The motorcyclist was taken to hospital with a suspected broken leg.
Police say that the road was closed at 7.20am, one lane being reopened at 7.50am with traffic being directed by officers, who are there until the vehicles can be removed.
Anyone who saw what happened should call police on 101.