The incident took place on the N25 yesterday afternoon.
The accident occurred after the man crashed into a tractor on the Waterford bypass.
The man, in his 60s, was pronounced dead at the scene of the accident.
The man driving the tractor was 25, and was taken to the local University Hospital in Waterford.
Local Gardaí say his injuries are non-life threatening.
An investigation is now underway into the accident and the scene was examined yesterday by Garda Collision Investigators.
Anybody with any information regarding the crime are urged to contact Waterford Garda station.